While many of us guys will go for the trackball aka nipple, I still prefer the optical joystick. It's a flat button which can prevent any accidental pressing. Besides, the trackball protrudes out from your phone and is constantly rubbing against your pocket so it will eventually wear out. Or worst, your keys in your pocket may accidentally scrape it off.

The Desire is actually pretty good looking. I've personally seen the N1 and now I'm holding a Desire, the feeling is almost the same but that one protruding trackball is quite a turn off actually. Haha

Here's my review of the phone:
http://blog.galvintan.com/review-unboxing-...-desire-part-1/