@Dan - have to agree about Windows 8. I installed it here to try it out on release day, and it lasted until, well... yesterday morning when I put 7 back on.
It's got some good optimisations in there at the back end and I like some of what they've done, but overall it just feels like a big old mess. I'm sure I can get used to the interface in time, and I would if I could see that it was progress from what we had before, but it just doesn't feel like an "improved" UI at all, just a newer one.