clothes say a lot about you, and not just in the obvious ways. This is intended to be an ooc ask game, but I'm not your dad. These are soft discussion starters, so just ramble about what parts of each question you find interesting, but do try to think about things you don't normally wonder about. Let's go.
What kind of materials does your character like to wear? synthetic, natural, nylon, polyester, leather, cotton, wool, etc. does your character have sensitive skin? do they choose style over comfort?
At some points in life you have to wear formal clothes lest you look like an asshole. How often does your character dress formally, or can they barely be convinced to not come shirtless to a funeral? what do they choose to wear, what can they afford, do they feel out of place? in short: how do they engage with formalwear?
Whatever you do to keep living, you gotta dress appropriately. how does your character approach workwear, do they have a uniform? if so, how do they feel about it? are their clothes there to be durable, mobile, appealing to clients, etc.? how quickly do they take off their work clothes and put on their normal clothes?
jackets, coats, unbuttoned shirt, how does your character layer? purely utilitarian to avoid the cold? annoyed that it's too hot to wear their fave jacket? when it comes to jackets, heavy or light? high tech like a bloktech or arcteryx, or low tech like a wool or leather jacket?
how does your character feel about tight or loose clothing? what cut are their pants, bellbottom, skinny, yadda yadda? do they size up, down, are they nonplussed in either direction? do they like to keep it tight in one area, loose in another?
does your character own anything they can move around in? Do they just own sweats so they can relax in? If they exercise, do they buy/wear proper synthetic activewear or do they wear the free shirt handed out on the street? when it comes to shoes, do they need specific shoes? how much cushioning do they need when moving and running? are they a freak who wears those toe shoes?
How much skin do they like to expose? if they have to swim, what do they wear? how do they feel about flip flops?
how much do they get on when going out for a quick errand? on a base level, with as little thought and effort going into their outward appearance, does their wardrobe make it clear they're fashionable? do they even care how people see them in these situations, and is fashion something that's only active choices, not a passive web of decisions?
does your character have cultural garments in their closet? how often do they put them on, do they try to make it a part of their every day outfits? are they looked down on for their garb, how do they feel about others wearing their cultural clothes?
Does your character care about where their clothes are from? do they think about labor that goes into clothes? have they bought from fast fashion, do they only purchase union made, are they aware yet willing to compromise? does your character look at stitch quality and details that set apart the quality works?
//Clothes are complicated and filled with many complex topics of discussion. I just got a few out of my head, and had to call a stopping point for now. theres so many more questions about gender, accessories, quality of craft, comfort, trends, thrifting, disposing of clothes, undergarments; honestly, however deep you thought the well is, it's deeper. Let me know if you want a round 2, I'll come up with more.