I tried Win7 (x64) for a day.-nosh
With all due respect, trying out Win7 for a day isn't a long enough trial. It sometimes takes longer than that for the new way to 'click' and get used to The New Way of doing things.
The system mostly felt light but there were a few random delays when I least expected them. I also encountered a BSOD (don't remember the details),...
The random delays and the BSOD points to a driver problem. Driver problems always taint the outcome when trying a new OS.
...I don't care for the Superbar or the new start menu,...
You can go back to a more conventional way of behavior for the Superbar if you wish. Most people who have taken the time to get used to the way it works, though, usually prefer the new way even if they initially disliked it.
By nightfall I was questioning why it would be worth my while to choose Win7 over XP32, which works brilliantly.
Again, with all due respect, I question why you would try out a new OS for only a day. There's a reason why MS gives a 30-day trial with a documented way to extend that trial up to 120 days. It takes time to adapt to new ways of doing things.
When I tried to play a particular 720p HD movie file (latest 64 bit drivers installed, all eyecandy disabled) the video was quite choppy. Other video files with even higher resolutions played just fine, though. Perhaps a video driver issue...
Since you were quick to run back to XP we may never know, but I suspect it's related to your random delays and your BSOD....and definitely do NOT disable the eyecandy or Aero if you have a decent video card. Your video will perform vastly better with Aero on than with Aero off....if you have a decent video card.
Bottomline: there was no wow factor to motivate me to break something that works so well and start from scratch.
My bottomline reaction is you didn't give Win7 a fair chance. You had problems (and with computers sometimes that happens), but you really didn't indicate that you put forth much effort to solve those problems.