Owning 9 chondros I can tell you that
1. They are not rocket science to keep. Yes, they require specific husbandry and will nnot tolerate errors like some species. However, if you do your homework, they aren't any harder to keep than anything else.
2. Like most species, you're going to have some that are easy going and some that aren't. Arboreals tend to be more nippy than some species, but that doesn't mean they all are. Of my 9, I have two that bite when handled. Out of the 7 that can be handled easily, I have 2 that stress easily so i don't handle them. Three of the remaining 5 are very mellow and can be handled by anyone...even children. the other two are young neonates and I don't handle much except on their perches to avoid injury to the spine. However, they do not bite at all and the one seems very mellow and will climb onto your hand if you take his perch out.
3. I use paper towel on neonates and then go to sphagnum moss for adults and babies. it keeps humidity well, resists mold and will not hurt them if it is ingested accidently.
4. You cannot feed a chondro outside the tank. Or lets put it this way...good luck with that. I feed all chondros and amazons in their tanks. Chondros perch to eat and take the food off the perch. The other problem is that they will most likely take your hand off when you try to get them out to feed them. After dark, all my chondros bite whatever comes in the cage...especially if it's warm.
If you want a cuddle snake...then no, arboreals are not for you. If you want an awesome display snake that you can sometimes handle, then they will be. I'd suggest getting a yearling or older for your first. You'll have a better chance of assessing the temperament at that point. Always purchase captive born and bred and avoid captive bred animals. Anything imported will most likely have parasites and can lead to more problems. Get your first animal from a reputable breeder.