I've handled corns, BCIs, and ball pythons and I would definitely say BCI seems to have the most personality. Corns seen to just dart all over the place, too active for me and ball pythons don't really want to explore, it seems like the motive for them is looking for a place to hide.

BCI are actually curious to me at least. The one I held was very sweet too, and although he was the biggest snake I ever held, I didn't feel threated by him at all. They're not too fast and not sluggish like a ball pythons either. Can't wait until the day I can own one!