Based purely on this weekend alone (and very possible to change quite a bit throughout the course of the series.)
Favouites: Matt, Pamela, Scott, Gavin (who surprised me, quite a lot!), Jimi and Patsy.
I don't necessarily have any "least favourites". The rest of them weren't anything special, but I had no problems with any of them specifically. I was disappointed with Tina (Like somebody else said, I think Jared played part in the reason why) and Michelle (But that's my own fault. I automatically assumed she'd be great.

) but not to a worrying extent.
I'll probably have a more solid view by about week 4. So long as there are no absolute duffers (or if they are, hopefully they have a personality to make it somewhat bearable) I can see this years lot being a "comfortable" bunch, in that I wont be Jumping for joy at any of them, but I wont be sat willing them to just disappear.
Last year was the first year I didn't have a solid favourite at any point in the competition, and I wouldn't be surprised if that happened again this series.