I switched to Vim because, as I was transitioning to Linux from Mac OSX, I needed a cross-platform alternative to TextMate. After 10 months spent trying every cross-platform (Mac OS X/Linux) editor/IDE from joe, ne, or even diakonos to NetBeans and fiends, I found Vim and Emacs to be the closest to what I wanted/needed. Ultimately, the intuitiveness (yes) of Vim's language won me over and now, 3+ years after I took the plunge, I don't regret anything.

I agree, switching to Vim just because it is fashionable is a dumb move.

For the record, if ST had been available for Linux and Mac OSX at the time I was looking around, I'm 100% sure that it would have been my choice.