Scarlatti Sonatas. I'm content learning about two per week at the moment, nothing too hard (L.449, 224, 245, 335, 241, 30, 36, 186 and 23). As soon as I give one the once-over, I move on to another. It's fun. After I do about a dozen like this, I'll probably record them.
They're like potato chips. Nobody can play just one!
Scarlatti chips, anyone?