You know which one I mean, the little avatar type pic you get at the side and on their stats bar. Why is it the vampires have different ones? (so far I've counted 4). There's the:

1. I vant to drink you blood! type 'rar' pic
2. Lookit these big teeth! (random open mouth)
3. I'm too sexy for my fangs (suave.. very Dracula)
4. Why did you do this to me?! (absolute mortification)

So... anyone got any answers? I notice that it's changed when I change my Sim's appearence...

It's the same with other poses sims have; there are several variations to keep them from looking as if someone roboticized them and made them stand exactly the same way :P

See I feel so deprived, I never get new poses *pout*

you just have to change their appearance in the mirror and the poses change too.

Yeah I sometimes find myself make my Sims change their appearance like 10 times before they get a pose that actually looks good with their face! haha... I like how vampire Sims look... I wonder what Sims that became werewolves look like... I definitely have to try that... I hate zombies though... eww they disgust me...

I believe there's actually 6 of them. If you get Squinge's updated Hula Dance & More hack, it includes the vampire poses... very useful if you want sims to look properly RARR for pics.