Great post, Dave! You've hit the nail on the head. Left hand bass is something every keyboardist should try to accomplish. Also, a knowledge of keys, scales and chords helps immensely when moving away from the basic notes of the chord.

I liked your comment about simple rhythms. I search for the more simple rhythms because I feel they are more natural. Sometimes I just want to scream when I a particular beat, but have to put up with all the background rhythm stuff. Give me a simple chord and a walking bass anytime.

Good job!