MUSIC. Alter doesn’t often listen to music, because it is one of many things he’s usually too apathetic to seek out. However, when he does bother having an opinion, he tends to prefer songs with a heavy bass line or synth use. He’s not really picky in terms of genre or content otherwise, though. Sometimes, when his tinninitus acts up, he’ll listen to music to distract himself from it/drown it out. That’s usually the only time he actively goes and seeks out music, though.

FOOD. Alter is beginning to get rather irritated with people often offering him food or bringing it up to him. He does what he can to remind people he doesn’t eat, doesn’t cook, and doesn’t want to do either, and yet people keep giving him food or asking him to cook. It irritates him mostly because it reminds him that he is still seen and will be seen as bargain bin sad Emiya rather than a different individual, and he is still the Inferior Emiya.... and also it’s a goddamn waste of food. That takes work to get, and there’s actual humans living in Chaldea! Give them the food, stop wasting it on people who gain nothing from eating (huffy Alter noises at the waste of food).

SOCIAL MORES. Alter understands proper social interactions, but that does not mean he feels like following its rules. He comes off as very cold, very blunt, and pretty rude just because he finds being polite usually a waste of time. He will be nice if he needs to lull someone into liking him, and he’s more likely to be polite when he’s tired. People who are overly formal to the point of not directly delivering information annoy him greatly.

Because he doesn’t bother with a lot of social niceties, Emiya comes across as a lot more angry and callous than he actually is. He is rather angry and callous, but usually not as much as he acts. It just serves to keep people from wanting to hang around and playact nice with him, which Emiya is all for discouraging.

DRESS. Alter, when told to blend in with human society and not wear his Servant garb, has exactly two modes of dress: ‘mobster in the 20s attending a highbrow formal event’, and ‘a thrift store exploded and coated some poor man in hoodies three sizes too big for him’. There is absolutely no in between. When he’s going out and actually doing things he tends to wear button-ups and suits, all fitted and made of nice fabric, and then spend his down time in three jackets, none of which fit, and sweatpants tucked into military boots. Alter is an enigma. (This also applies largely to his humanverse.) He’s either unnervingly well dressed or looks like a fabric monster pulled from a gutter. 

In all styles of clothing, Alter prefers dark colours with yellow or red accents. All of his modern (re: not his Servant garb) clothing has space for gun holsters and probably a knife or three.