1. The program messages do annoy me. To install a program, you have to select "Run as Admin". Yes, it ****es me off. That's why I'm not being crazy going for XP, I won't touch it until 2008. I agree that it's a memory hog, even with 1.5GB of RAM, it was using 1GB with one user, I always had to log off when somebody else wanted to use the computer.
2. I don't like the new GUI, I don't care about the glass effect, I really like having more performance and using the "2000" look.
3. I must say, I do like the "live" Windows when you are highlighting a window in the taskbar, but again, just another useless memory hogging feature.