1: What is their temperment like? Are they very docile (Like a BP), or are they mildly aggressive or very aggressive?
My boa Jaxson is very relaxed with me... im the one who holds him on a fairly regular basis (couple times a week) when my husband holds him he is very flighty and doesnt want to be near him, i blame that mostly on the fact he doesnt like boas. he has an amazing feeding response and i know better then to hold him when hes due to eat (or the day before) he gives a nice big loud hiss and i know today isnt a good day. otherwise hes great.. just as docile as the ball python but with a curious twist... i love it about him. i have mostly balls (10 total currently) and one boa... hes just enough for me
2: Whats the average size I should expect it to get? and whats the max possibility it could get up to. depends on the species you get... i would suggest doing your research, males stay smaller then females though. my 7mos old is over 300g and about 3ft long give or take (need to actually measure him)
3: What kind of enclosure, hides, substrates, size of encolsure, temperatures does it need to be maintained?
i have basically the same set-up for him as i do for my BPs, standard black hide, porcelain water bowl, exc one exception of a grape vine branch (?) thin/twisty branch in his bin.. i do that so he has something to climb/rest on.. although i rarely see him using it at least its in there. for temps, substrate, exc you need to do your research... we use all newspaper or papertowels here currently but in the past when we used aspen he loved burrowing in it.