I prefer design than many functions. My favorite phone was the Siemens s65. I think it's a great piece of design: It couldn't play mp3s and the camera was awful, but I liked this model very much
I have used many but i know what im using now it iphone ok ok I looked at it that is how i know it. lol
I am using sony ericsson w810i for 2 years... i love that phone very simple and reliable and it havent showed any trouble atleast once!
I have a few (I work for tmobile tdms) an n95, a blackberry pearl.. the newst one if the g1... I'm quite lucky in that we get to test pretty much every phone that comes out.
I've been using Moto Razr for 2 years now.. but i'm planning to buy a new one within the first quarter of 2009..
Nokia 2100 (lost it on local train) -> Sony Z550i ( Water damage..No warranty) -> Nokia N72 (Keypad was not good)-> Moto Razer V8 (Will die within few months) :|