I can only speak for my Borneo, Juice, who I've had for about 6 months now. He's awesome! I absolutely love him. He's so different from any other snake I've ever kept, and different from any species I'd ever handled prior. He's the epitome of a "lap snake". He's perfectly happy to just sit and chill. He'll find a comfy spot on my lap and plop himself down, keeping a watchful eye on his surroundings, but staying generally still.

As for temperament, he's so far been all bark and no bite...or should I say hiss?? He'll occasionally hiss a little bit when I first put my hand on him, but realizes quickly it's just me and settles right down. So far he's only hissed quietly, mouth shut. No big, serious hisses, just little hisses to let me know he knows I'm there. He's never struck or shown any signs that he might.

My only knock so far is that after he broke his fast he will only take live, but he's only eaten 3 meals since, is currently in shed and that's a work in progress. I'm confident he'll be back on F/T soon enough.

As for Sumatrans and bloods, I can't compare since I have no hands on experience. I chose a Borneo first because they're generally smaller than bloods and I just liked the normal Borneos a lot compared to Sumatrans. That being said, I will DEFINITELY be adding a blood or Sumatran at some point, and possibly sooner than later. There are some beautiful bloods out there and I'm really digging the blackhead Sumatrans.

Good luck, please keep us posted!