I like Windows 7 64-bit coming from XP 32-bit, I loaded the Win7 32bit first, but I decided to try the 64-bit after hearing it was faster and mainly to use 6gigs instead of 3.5. (had 2 1gig sticks of same make as the other 2 to use and have had Win7 itself test them all)
Hard drive speed IS MUCH MUCH faster! (this alone will prevent going back to 32-bit on this PC)
The bad? Incompatible software, 64-bit issue only:
Avanquest's System Suite Pro 9.0 is basically Fix It Utils now, its firewall I liked so much, is toast.
Win7's firewall sucks, I'm using Comodo's now, their Internet Security is free, includes AV, very extensive Firewall, pain in *** while first using, due to all the approval popups, but I can handle it, I made it even more anal then it defaulted to, you can adjusted it to make it easier, but then I believe you lose some of it's advantages.
Thankfully Auslogics Boost Speed is fully Win7 compat and surprised me with a lot of valuable Win7 config settings. (try the trial, lasts 15 days I think, $29.95 for 3 PC license, bargin!) I'd been using it for about 6 months in XP, made up for SSP9 functionality death.
[version 10 of which I ran across mention of, but not sold by them atm]
Casual games I had loaded are a mixed bag, even using troubleshooting compatibility within Win7 I got immediately BLACK SCREEN OF DEATH on many of them.
Peggle Nights (Peggle's sequel) black screens no matter what, Peggle works but only if I load it within the troubleshooting compat feature (but don't close it during 'the testing' phase, that's bizarre!
The TC says it's not compatible at the end, but I just played it, sir!
So I made a folder on my desktop called: Games req'n TC.
EQ2, Vanguard, Legends of Norrath, Dream 3D Pinball, all work fine.
Just tested Painkiller Black Edition, and it works, loads 25x faster than before!
All eGames products got BSOD (Black) and I had bought a lot of those cheap over time. 8(
16-bit Windows games? Forgetaboutit!
Definitely check this thread out for tested Win7 freeware: www.sevenforums.com/software/92-free-great-programs-windows-7-a.html
Good place to discuss Win7, many people having issues, that BSOD thing is really the only major gripe atm. I suppose XP Mode might run more of those games, if I had it? (I have Home Premium, which doesn't, haven't heard XP Mode mentioned much, read beforehand that is was mainly for companies that need compatibility with old specialty apps)
Learning curve/adjustment time, I do have XP still on another hard drive that I can just load with a few changes in my BIOS, when needed.
SO overall: B+ (would have been A if it at least gave me recoverable error instead of BSOD on the games)
Peace and good luck!