I didn't realize that you went back to 7. I thought you really enjoyed using 8?
Yeah I'm on 7 Ultimate at the moment. I did like 8, yeah, it was quite nice (better than Vista, certainly), but sadly AMD drivers and Photoshop weren't playing nice on 8 for me (or anyone, looking online).
The problem I was having with Photoshop was that the screen kept flickering (going black etc) due to the graphics drivers not having good enough support for GPU acceleration. If I disabled GPU acceleration in Photoshop, the problem went away, but it was so slow. I've been looking on AMD's site since about the middle of March for driver updates (not betas, mind you) and the latest driver (13.1) is the one I already have installed - and it was released in January.
I did read however that the 13.3 Beta drivers they've put up fix some OpenGL issues, so it may sort the problem, but I'm not one for beta driver software of any kind to be honest.
Although reading that a beta of 8.1 is around the corner kind of suggests that 8.1 will be here soon(ish), so hopefully by the time 8.1 comes out, AMD will have sorted the problem. 8.1 looks to be an improvement over 8, and if we're not going to have to wait too long for it, it makes sense to stick with 7 until 8.1 comes out and probably forget about 8 (for me at least).
Being into photography and all that, I use Photoshop a lot, so it was a pest that it kept playing up with 8.