2. By the end of month 1-2, vim had become completely second nature. I did stuff without thinking. Actually, thinking about what I was doing started to confuse me.
3. Sure we all spend lots of time thinking, but I also often find myself cranking out code and vim is quite amazing for that.
4. I ended up switching to emacs because a) I like learning about tools (see #1) b) emacs gives you a more IDE-like experience c) while retaining 90% of vim's editing power d) and in general has the similar "become an editor expert" philosophy to optimizing editing workflow
I haven't used sublime, but I'm quite fond of editors that are keyboard-only (especially for jumping around, etc.), cross-platform, have stood the test of time and have endless extensibility.
edit: I have customized both vim and emacs to crazy depths. There was a time when just as I started to code, I'd say "why can't I do this [blah] drudgery automatically?" and end up writing an emacs function to do it :-)