I have a Sumatran albino female and a Sumatran short tail ("black blood") female, both sub-adults, and though the short tail girlie had some defensive reactions in the past (note I didn't say aggressive) she quickly grew out of that with more frequent, but short, handling sessions. With my experience with my two I would say neither are unpredictable and sure not aggressive, I think it's mostly how you approach them. I'm really enjoying mine and love to watch them grow: and boy do they grow fast! :P
Tim: Vega, my shortie from you that you gave me advice on, really has done a 180 since when we talked last. She's just a big (well, still relatively small) puppy dog and doesn't mind being being handled for longer spurts, being carried or lifted around if needed, or being sat on a lap to just sit there and relax anymore. I'll get more photos when she's shed since she's blue right now. :)
