I don't read music. I keep telling myself I should learn, but between you and I, I'll probably just keep telling myself that...
I'm a singer/strummer, so most of what I play is fairly straightforward. The the vast majority of songs I play are "pop music" of some kind. That means that the rotations are usually fairly simple and there is usually an intro or hook that sets each piece apart from all of the other songs using a similar rotation. I use chord sheets almost exclusively, but chord sheets are rarely complete and even more rarely in the right key. Many times they leave out intros, bridges, hooks, etc., and almost never have a time notation. Sound samples help me figure out the missing bits.
Not that it always works. Sometimes there is still a HUGE difference in what I know a song should sound like and my ability to fill in the blanks. A lot of times I'll simply decide a song is good enough for the girls I go out with and come back later to work out better arrangements as I improve. I always use sound samples when I'm re-arranging a song.