GetJar conducted a phone-buying poll asking about the most important features of the phone.
Here are the top 5 features according to the US users (sorted by the importance):
1. User Interface (was the most important feature).
Interesting, isn't it? I would have thought form factors are an important parameter as well...
I've looked through the web some more, and found another survey with slightly different results:
What are your considerations when purchasing a new phone?