Would a Blood python be a good next step for me to take?

[Kryptonian]

Both can be more aggressive then bps and boas. You would be best off to get a baby and get it used to handling while its young and the bites are not so bad. A blood can get very heavy, especially females and when they strike they lunge thier entire body at you. So thier strike distance is longer. You will definately be feeding larger prey to a blood.
Jcps are long but slender. Female agian would be bigger. They are also semi arboreal. Although some people keep them in bins in racks, I am sure they are happier in a cage where they can climb. I know mine loves climbing and I could never bin him. They are nippy as babies but most with lots of handling calm down nicely. Mine is as sweet as my bps, sweeter then a couple.
I had a blood borneo cross that unfortunately died when her heat pad malfunctioned and burned her bin. She was very tame but her siblings were mean. If you get heat pads definately get some kind of temp control for them.