I'm working on improving my endgame. Trying to work my way through Dvoretsky's Endgame Manual, I love to practice endgames. My favorite books are Chess Fundamentals by Capablanca, which I recommend to beginners, and My System by Nimzovich.
I am also a wannabe theoretician. See my notes in my profile. I have an interest in the game theoretical aspects of chess.
Good luck with the games!