I have focused a lot on over the years on improving my lead playing, e.g. minor/major pentatonic, arpeggios, and lately a bit of diminished, etc. As part of my homework with Chris Buono I also do lots of Guitar Gym drills to be able to play chords in different ways. I came to the realization there is a whole other world out there when it comes to rhythm playing. There are so many good options when it comes to playing chord alternatives but it takes some practice. This also important when you have play with more than one guitarist and want to NOT play the same thing as the other guitarist. My point: playing good rhythm is also just as challenging as trying to come up with a good solo!!