there will be no vi so this is for the patient and hardcore only.
i will say i think he is an enneagram 5. i suspected 8 at first but 5 makes a lot more sense (i'm only mentioning that i suspected 8 to help illustrate what he's like - he is a 5, but he is not meek or obviously withdrawn, at all.)
he has slightly jerky movements. doesn't fidget a lot. when he is deep in thought sometimes he has the habit of grabbing his hair and twisting, ending up with a unicorn hairdo and not noticing. he hums cheerfully sometimes when preoccupied or under slight stress. his voice is often louder than necessary but this could be due to the fact that he has issues with his hearing. sometimes he becomes very animated when talking and this presents itself in his leaned forward neck and shoulders and his eyes brightening. when this happens the corners of his mouth turn up a little and he gives the impression of trying not to smile. overall most of his body language is from the shoulders up. he can be very animated.
his physical presence can be intimidating to people who don't know him well. he strikes up conversations with strangers fairly often, and with his leaned in body language and sparkly eyes and loud voice and excitability, he doesn't seem to realize that he might come off a bit intrusive. this is subjective, but to me his demeanor when being friendly with people is like he's giving the impression he's letting them in on secrets and anticipating their surprise.
he comes across as pretty eccentric sometimes and i have no idea if this is something he cultivates, doesn't care about, or doesn't know. like, waving his cane around at children and dogs and ranting, lol.
his sense of humor is pretty crude, he likes dirty jokes, and he says things to get reactions (his reaction to hearing that i cut my hair short: "what are you a butch dyke now?") but this is in contrast to the fact that he's actually quite conservative. he's an older guy - in his 60s - so this probably influences his attitudes towards social issues, which are pretty standard old-fashioned: races should stick together, the "gay agenda" is bad, etc.
he can be very knee-jerk and forceful about defending his beliefs, which are sometimes idiosyncratic. for example, upon hearing religion referred to as "myth" when somebody was referencing a book which used that terminology, he started yelling and became inconsolable about the fact that it was just the term being used for academic reasons. "my religion is not a myth! i will not tolerate that!" another time he saw somebody wearing blue fingernail polish and started talking about how they practice witchcraft because non-traditional nail color is a sign of satanism, and when i tried to explain that it was just fashionable these days he dug in his heels and insisted. blue fingernail polish = witchcraft, 100%, no bullshit. its not unusual for him to get odd correlations in his head like that and defend them in the face of common sense.
he wears a lot of button-up colorful shirts. he likes sci-fi, westerns, and boxing.
maybe this is age, too, but when in my company for a long time he starts to obviously take it for granted that i will cater to him with food and getting things for him, etc. where he stops asking. and he can be very particular about his tastes. like in everything else, he expresses his opinions firmly in this area. but he's more vocal with the negative. a meal can be "..not bad" (with an eye twinkle to let you know it was actually really good) or it can be "terrible! i can't eat this"
(and everybody must know it!)
he has a weird attitude about attention. on one hand, upon finding out about cancer that he was told would kill him soon, he decided he would absolutely not stick around anybody that knew him because he didn't want to be seen dying and he didn't want people taking care of him, so he got a camper and ran off halfway across the country. on the other hand, i've gotten a random phone call from him saying, "what do you know about anaphylactic shock? i might have it" and after i tell him to go to the hospital and then call me back, saying, "i'm not going to call you back, i'll be dead." (!!! funny !!!)
i could keep going and going and going but this is already probably tl;dr, if you have any specific questions go ahead and ask.