Anyway, none of my friends who've owned a recent Blackberry have liked it at all (and I know tons of people with one since RIM is pretty much right down the road from me :P) and if you're trying to stay away from Android for now... that kind of only leaves Windows and the iPhone. I've no experience with Windows phones though so I'd probably just suggest the iPhone. :/ Helps with the colour thing, too. (Or skins, anyway.) If you're not into apps, Windows is a distinct possibility but... if you do like having a selection of apps, it's not a very safe bet yet, I don't think.
Blackberry is truly a hit and miss the last few years. They are slowly redeeming themselves though. I have the Blackberry Curve 3G (9300) and aside from the fact that I would prefer a touch screen, it works perfectly for me.
As for the Windows Phone 7, the UI design kind of sucks, but the apps work quite well, and it is, overall, a good system. It's just being careful with which phone you're getting (I had an LG Optimus Quantum). Some phones just don't do the system justice.
I've never used an iPhone, but I do have an iPod Touch (the main reason I didn't want an iPhone) and it doesn't crash very often, but when it decides to crash, it screws me over completely.
I truly cannot give any kind of opinion on Android, since the only thing related to Android that I own is my newly upgraded Blackberry Playbook, which can run a set selection of Android Apps.