BPs do have personality, it just takes a bit to discover.

EX:
I have noticed that my baby has favorite spots she likes to be when I have her out and I am doing homework, like in my sleeve or wrapped around my external hardrive. She also has been known on numerous occasions to get up under my laptop and cruise around my desk with it on top of her. She is a clutz, and gets very sulky when she does something stupid like miss strike during a feeding or slide off my lap and fall. She loves to be let out in the garden - she cruises around with her tongue darting everywhere.

Do remember though that they are nocturnal and they love to hide. So if you don't see your little one out of his hide very much while he is in his cage, never fear. If you want to see them active in their cage, film them at night.

As far as dislikes/stress, it displays in a couple ways in my baby. For one - she balls. Easy enough. She also gets head shy when she is stressed, even though she isn't normally.

And some days, even when everything is right with the world, they don't want to be handled. Normally when that happens I try putting her back in her cage after five minutes or so.