Personally, I'm just a tad bit concerned with the whole "skinned UI" thing that goes on with Android. I sort of thought we were passed that after the precedent of the iPhone.
I mean, I realize Android is potentially portable to alot of different form factors of phones rather than the unified design the iPhone has the advantage of having, but I still sort of get annoyed thinking if I move from one Android phone to another Android phone by a different manufacturer I may have to get used to some new skinned version of Android - unless all of these allow you to move back to some default. I honestly don't know since my knowledge of Android is limited.