So, before I start, I think we just need to talk about some misconceptions first, one being that an empty house has no meaning or value to your life, the lack of placements in that area being equated with complete silence, like an empty house. The most common practice people will use, when trying to understand empty houses, is by looking at the houses "lord", aka the ruling planet of the empty houses' ruling cusp.
When looking at the house lords, I prefer the modern method (but still use Traditional alongside it):
When looking at house lords, we look towards where that placement falls in our chart, using the house it falls under, any aspects, and if you apply it, malefic/benefic delineations to understand how that houses themes express themselves. So, say someone has an empty Cancer 3H, the lord of that house would be the Moon, meaning that we look to their Moon placements, any aspects towards it, etc. to understand how they (3H) communicate their emotions.
For me, under that same circumstance (empty Cancer 3H), let's say the house cusp is at 25° 25°- Aries- square degree influence- causes conflict between (25°) their desire for leadership and (square/cancer) their understanding of being able to express themselves as that leader. So, through house lords and other theories, we're able to see that we are able to find meaning in empty houses. Especially when it comes to transits through those houses, we can miss out on a lot in our chart if we treat these transits as *entering a void*. So, now to go through the houses and what they mean on their own! If these don't apply, try applying the degree aspect method and see if you have square or inconjunction degree influences over said house.
This is someone who doesn't have to put thought into who they are, most struggles they face when it comes to their identity having to do with almost being careless with who they represent themselves as. This is someone who doesn’t feel the need to prove themselves. An empty 1H is someone who... isn't by any means immune to insecurity, but they aren't driven by it. Doubting themselves, if they're able, only happens in response to failure, needing a direct cause to make them start thinking about themselves.
This is someone who has an easy time communicating their morals, values, and need for stability to people, sometimes overstepping by laying out an NDA for a new friend. Empty 2H folks tend to be... while they value their possessions, this is someone who isn't broken by something breaking. If they lose something, to them, all they can do is either find it or replace it. There is no intermission with them, they push forward.
This is someone who... may have issues with recognizing social dynamics and cliques because they're so ready to give everyone an equal opportunity to get to know them, usually never considering what can be done with all that information. An empty 3H shows someone who, really, talks to hear themselves talk. While the house may be empty, this is where the silence of it becomes uncomfortable, pushing the native to make up for it on their own.
Empty 4H's tend to have a cohesive home life, possibly getting in trouble for not switching things up enough. These are folks who tend to go home with the intentions of staying home, entering a new mindset depending on what side of the door they're on. The 4H being empty can show someone who, actually, needs an empty house. Not having any placements, these folks aren't used to not being able to escape the stress, so shadow work literally starts at what they consider to be "home".
An empty 5H represents someone who, maybe even though having a touch childhood, still never lost their connection to their innocence and curiosity. This is someone who's never felt scared of or embarrassed by their own need to share and receive love. The 5H being empty shows someone who tends to follow trends more than starting them, and it's because they don't mind being introduced to something new. Their love isn't limited by any insecurity, their heart reaches as far as consent allows them to.
This is someone who has little problem staying organized, or lives life so comfortably that they have their own version of being organized. These will be the 6H cusps to have their own system, holding to it no matter how much sense it makes. When they don't need to do a lot of work to maintain their life, this can sometimes lead to them... not being so great at adhering to other peoples' schedules. They tend to assume everything will take the least amount of work, sometimes falling apart because they didn't check up.
An empty 7H shows someone who, usually, doesn't ever know the relationship is going south until they're literally told it is, assuming everything is alright as long as the two people who need to be together [are] together. They're truly about "us against the world", having a habit of forgetting, romantically and platonically, to check up on the other person and actually ask what they need out of a partner. This 7H needs to focus on more active communication, even if they don't think they "need" it.
This house being empty shows someone who has no hesitation in how they share themselves with people, simply following the desire to be closer to someone and wanting to be the one who changes them for the better. And it isn't necessarily their goal to change the people they love, but intimacy to them is pushing each other forward through the anxiety and fear, not letting each other get stuck in feeling out of place-- fear they forget to say they don't really experience.
This is someone who swings around a sword with three edges, one who needs no validation for their beliefs, one who sees no limitations in exploring other peoples' beliefs, and one who asks so many questions that people perceive it as doubt. Empty 9H'ers are... always looking to understand, over anything else. I think sometimes digging too much can get them in trouble, but it's never enough to put an end to their curiosity, because that ease in their approach to expansion already accounts for growing pains.
The 10H being empty represents someone who doesn't usually feel a strong desire to change who they are to affect perceptions of them, not seeing value in being [known] if it means they have to be known for being someone else. This is someone who... for better or worse, rushes past criticism, setting their minds to a goal and only accepting failure if that specific goal isn't reached. This is representative of a hard worker, but tunnel vision can be their worst enemy in terms of other areas in life.
I think, when it comes to the 11H being empty, this can either represent someone who finds ease in surrounding themselves with people, or finds ease in knowing they don't need that many people in their lives. An empty 11H shows someone who's dreams change constantly, maybe so much that people lose belief in their ability to follow through, but everything is connected. They may bounce around a lot, but every "thoughtless" risk they take has purpose.
Probably being the most intimidating house to face silence in, an empty 12H, to me, either represents someone who is in constant communication with themselves, or is so driven to push past their subconscious that they don't find the closure they need. An empty 12H shows ease in the connection between conscious and subconscious, but not everyone can handle a relationship they have little choice in being a part of. Sometimes it's silencing the endlessness of their anxiety that helps them find the answers they need.