I spent about 30 minutes talking with Andre the Giant,the Undertaker, and others of that group in the lobby of a San Francisco hotel about 15 or 20 years ago. I came away with these impressions. All of those guys were buddies and they all hung out together after matches and as they traveled from place to place, accompanied by a large but not overwhelming number of managers, girl friends, wives, etc. They weren't drinking alcohol, although it was about 1 in the afternoon. They all could have a normal conversation like anyone else. Andre the Giant had an enormous head, clearly some kind of a malformation from birth (he was seated so I didn't get a judgement on his height) The Undertaker seemed bigger than most of the others, and carried himself fairly seriously - he didn't seem to be joining in the messing around that the others were engaged in, although that just have been a momentary thing.
All in all, the performers seemed unusual but not freakish (except for Andres big head) and the mangers (or whatever they were) all seemed a bit greasy.