It's a toss up between colubridae and boidae.
I don't own any boas but my boyfriend has several. I like them because they can be slow and calm and they are so many different sizes, from dumerils and commons to rosys and dwarfs.
But I own colubrids and love them to bits. My Cali king is the softest snake I know! Kings are so active, never staying still when you hold them, just weaving in and out of your fingers. And I love it when they burrow and then re-appear with substrate on their heads. Such comical snakes :lol: And my corns are so easy to keep yet fun too. My youngest corn even feeds when in a shed and strikes and constricts his pinkies :lol: He always makes me chuckle.
But, thinking about it colubridae wins, just.