- Windows Mobile (Motorola Q)
- Various BlackBerry Devices (Curve, Storm, Torch, etc)
- Android (Nexus One)
- Windows Phone 7 (Samsung Focus)
- Android (Nexus One, again) + iPad 2
- iOS (iPhone 4S)
Having dabbled in J2ME, BlackBerry, Android and iPhone development, and having used all devices for a minimum of two months, I can tell you that,] if for some crazy reason, I decide to jump off the iOS boat, I will be going straight to Windows Phone 7 and not Android.
In terms of overall UX/UI and general happiness, I've found that the top three platforms are represented as follows:
1. iOS
2. WP7
3. Android
With regards to overall ease-of-development and awesomeness of API, as well as general happiness from developing for particular platforms:
1. iOS
2. Android
3. BlackBerry
Obviously just my own perspective, but I think this gives me enough authority to recommend a platform to a particular user when asked.