I don't mind cameras on my mobile phones. They enable me to take photos of stuff where I would never bring a regular digital camera. MP3 playback is nice to be able to use MP3 ringtones, but I don't care about how much additional space there is for music. Besides, you're supposed to use headphones for music on your phone. The proper music phones are actually pretty good at playing music, and 2 GB memory cards are really cheap, but I don't really like using all the battery life on that. Customizable ring tones are a good thing. I want to use nerdy tunes for ringtones. Wallpapers are also a good thing.

I also like to use my phone for internet when I'm on the bus, or stuff like that. Because of that, I like high speed packet data, and high resolution and responsive displays.