this may sound ridiculous, but the first time i heard mac dowell's 'to a wild rose' i really liked it. then, last semester i heard 'iceberg' or something like that also. they are short pieces, but perfect in description of whatever he wants to describe. also like, 'the tailor and the bear' (you can hear violins warming up, then the bear hears it and does a dance). i don't know why i like short poetic pieces.
all of schumann's stuff like abegg variations, carnival, etc. has short pieces that are connected. my very favorite still is probably mussorgsky's pics at an exhibition. same thing. short pieces connected. they are easier to hear in my head, and i don't worry that i won't get through (haven't tried pics from memory) and can focus on the beauty of the piece.
oh, yes, and i agree with the above mentioned mozart. i haven't heard anything of mozart that i didn't like and think wasn't perfect. i like the K595 piano concerto and think that's the most perfect.