I had a lot of affection for Alex in BB3, but I think he was playing a part as much as the others. I was taken in by his speech saying what a disappointment it had all been and how he was going to go to Germany afterwards. But, what does he do? Turns into another sad media wannabe appearing on any TV show that will have him.
Brian is the only one I was interested in for quite a while after BB because he seemed to have some genuine talent. But I can't see his career progressing any further than it has done, mainly due to the fact that he is a child in a 25 year old's body and doesn't seem to be interested in anything other than Westlife, S Club Juniors, and how much money he can throw away on designer clothes.
I thought Anna was great too but she was incredibly wooden on everything after BB and has disappeared never to be seen again probably.
Kate is just awful on RI:SE and has obviously only been chosen to front the BB coverage. They will ditch her afterwards (along with the rest of the programme probably).