You also tend to play characters that have a thing against technology =P
I also think people choose to play characters they (personality-wise) could never be in reality. Where they can say and do things without worrying if they'll hurt someone, or any sort of real consequence.
I usually play characters with aminorattitude problem. I think it reflects on myself, as my attitude can get rather nasty at points, usually this appears in male characters only (perfect example: Drake), while my females are considerably nicer in comparison (thought there are exceptions; like Cross). On the other hand, I also enjoy being the happy-go-lucky, never-ever sad characters (two notables: Joey Ip, and Zekekii).
I think I'd be typecast as playing asshole-males. Course I could be wrong, but I rather enjoy playing mean, male characters more than others =P