Yes, seriously. It's a personal preference. Is the second part of your comment intended to imply TextMate isn't a serious text editor?
TM is just something "good enough" for people not wanting to go full on to either Vim/Emacs or an IDE. People one would call "newbies" back in the day.
There are many things I've found I like in TextMate that Vim can't do - character-by-character undo, for example.