Hello! I've been wanting to add another snake into my reptile family and can't seem to narrow down what species I really want yet. I already have a lovely young ball python but I want to dip my toes into colubrid territory. I will be going to a Repticon near the end of September and want to have a better idea of what I'm looking for, as I'm interested into most species. I'm mostly looking for people's opinion on different species and why you enjoy certain ones.
What I'm mostly looking for:

- Preferably an animal with decent size (maybe 4-5 ft) that can be housed in a 41 qt tub when full grown (can up it a tad bigger if needed). I like the feel of holding a solid animal and not something too delicate.

- A docile species or one that can usually be reasonably tamed down. I like having animals that I can hand to friends and family without fear of them nipping them (My ball python was super defensive when I got her and am still in the process of taming down so I don't mind working a little for it).

- Depending on the species, I am quite happy with a wild type morph but I wouldn't mind some options

- I'm very open to not very well known species, perhaps unappreciated ones.

I understand that each individual snake has its own personality but I'm just looking for a starting point. Thank you!