This is just a notion I have, and perhaps others may not agree.
I stopped playing for years, and re-started playing a while back. In trying to get back my skills, I have been going to Chopin, especially his waltzes. I am practicing three of them right now -- by and large, not his most challenging ones. I have also mastered a couple and moved on. Some of his Preludes worked out well for me, also.
It just seems to me that Chopin is very pianist friendly. The logic of his left-hand chords seems easy to learn. The runs fall together very nicely, and learn quickly. They sound fast, but they are not that awfully hard.
Often I surprise myself at how quickly some of the walzes come up to speed.
Not all composers are so pianist friendly. For example, I have been playing parts of Moussorgsky's Pictures at an Exhibition. Some of these passages are very hard, even though they may not look that hard (slower tempo, etc.). Some of the measures seem to be asking me to do strange things with my fingers. So perhaps Moussorgsky is not very piano friendly. Do you suppose Chopin wrote with consideration because he himself was a master of the instrument?
Is this comment on Chopin just subjectivity on my part, or does it make sense?