[Beakybird]

The good: I know chords all over the neck, 11ths, 13ths, 6/9s, b5s. I can strum bossa, reggae, ska, country, pop, etc.

The bad: When I cross pick, I find myself stuck in the same patterns, and I'm getting tired of hearing the beautiful chords that I play sounding the same way.
I'm also stuck in my flat picking patterns.

When I listen to the acoustic Pandora station I created and that I listen to in the car, a lot of the guitarists are so outrageously good, I can hardly comprehend what they're doing - maybe if I watched them on video. They're slapping, tapping, getting outrageous harmonics, sometimes every beat is a new chord.

Can anyone recommend exercise books or that can help me break out of a rut?

Also, I don't want to get bogged down learning other people's songs - I prefer exercises, technique, and short compositions. For me, playing my own ideas is therapy I can't live without.