Indeed, I have 5 pen drives: two 8 GB, one 4 GB and two 2 GB ( the olders ). Right size is 8 GB IMO: over, better an external HD.
I have a few kicking around my laptop bag, the one I use the most is my 4 gig Crucial Gizmo....I just haven't had the need to go larger for a thumb drive. I have a 16 gig one at the office I got free from somewhere (swag promo from something)...haven't opened it.
16 GB Cruzer and several 4GB LG XTICK . I do use them, but not as much as I originally thought I would. The 16 GB is used as a small HD, although the transfer speed is slower than proper USB HDs.
I've got a Kingston 8 GB drive which I won from a game programming contest. Used to have a 2 GB one too but it got broken when a friend of mine accidentaly kicked it when it was on his PC.