You really can't go wrong with corns. But I'm much more of a Kingsnake fan. I've kept corns in the past but have moved on. But I'll always have a King in the family. My current King, Django is my favorite snake I've ever kept.
The care for corns is pretty much the same as Kings (and milks, the Kings cousin).
They're super easy, inquisitive, stay a very manageable size and are a lot of fun. Just be prepared that they're a LOT quicker than BPs and are great escape artists.