My biggest gripe is the battery life. My laptop gets 2hrs of life with heavy use, so I'd expect a phone to get a lot more.... they shouldn't worry so much about making it super thin, make it the same size or even a bit thicker if it means getting 12hrs of battery life with heavy use and a lot of standby. Alternatively, they could make two different batteries, one thicker for longer use, and one thinner for the dainty ladies out there.
Also, because the battery can run down rather quickly with heavy use; the phone has to be plugged in most of the time, and the power plug is really uncomfortable while typing, I wish they'd redesign the location or something...