Yeah, I couldn't read music for guitars to save my life (on saxophone back in the day however, didn't seem to be a prob, but don't get the occassion to bust that out these days). Never did even learn how to use tabs or chord charts either - just picked up shapes from friends in college and went from there, and most of the basic chords i just fiddle with by adding a pinky or taking off a finger barre or whatever - does that make it "sus" or "7" or "dim"? I have no idea! and then i scoot those same shapes up and down the fretboard.
I should REALLY learn some scales someday so i can try soloing or something, but my eyes start to glaze over when googling "mixolidean" or whatever, ugh.