I learned on acoustic. It's still what I grab the majority of the time. I have a MIM strat that gets a little time, but have to wear headphones to get it loud enough to enjoy it (I have 2 kids).
My current acoustic is an old Takamine jasmine something or other I bought probably 8 years ago from a buddy. It's my kick around guitar. I bring it camping, to festivals, etc. While I enjoy playing "nicer" guitars, I don't think I could own one. Unless I started playing professionally or something. My guitar gets it's share of abuse.
I mostly play rock, blues, jam band, reggae type stuff. I really enjoy trying to get a percussive sound out of the guitar while playing. Something like this. I found this video on youtube, and finally am able to play it after a good week of trying to get the rhythm part down, and being able to sing along with it:
http://www.youtube.com/watch?v=zn8R9GGxxA4