I started with Colubrids. They are more active than BP's, and there are so many neat species. If you want super active, the Asian rats and beauty snakes are hard to beat, but they can be jerks. Kings and Milks are active and very pretty, but can be finicky with feeding much like some balls (seasonally). Corns are active, pretty and sweet. Check out African House Snakes-- they are also really cool.