What's the attraction of Android for you? Is it that it allows you to do pretty everything that iOS won't or can't?
I don't have a specific attachment to the Android OS itself, but Microsoft, Apple, RIM--these guys are only making/supporting mid-priced "one size fits all" hardware, which just haven't been what I've wanted.
For my first smartphone, I wanted a dirt cheap phone on dirt cheap no-contract pay-as-you-go service--only Android provided that.
Now this time around when I bought my second one, I wanted the opposite, a super phone with a huge screen, highest available resolution, and tons of storage space--Samsung delivered with the 5.3" 1280x800 Galaxy Note. If anything like that existed with iOS or WP7 on it, I'd be interested in checking them out, but they don't.
Android is filling in the niches the others aren't serving.