I'm of the mind that - like spiders - certain morphs can have a predisposition toward temperaments, but I don't know that there's enough actual data out there to prove anything at all. It's something that has REALLY interested me lately.

I've heard specifically (and experienced first hand) that het reds can be slightly nippier/more aggressive eaters. This was years ago with my experience - I asked the question if others had this and a few said they had.