I've looked into them too.
I really have a love for semi arboreal snake. Boa constrictors fed the proper way are great, carpets are even better and the scrubs even more-so. Olives don't have a prehensile tail although they can climb. I'm not interested in completely arboreal species, I find the mix of the two is what I fancy.
I never know what I'm going too see with my boa or carpet, yet even with perches, 99.9% of the time our royal is on the ground in her hide.
I'll take the first two any day!
So my list is Brisbane coastal,Suriname BC, a scrubby or an SD retic.
AND,,,, Bredli is probably #2 or 3 on that list. I love the carpets.