Mozart was fine, I liked his works when I was younger and when I knew less about the classical world What I highly suggest is to broaden your horizon and find other composers because there are hundreds out there (who in my opinion are so much more worth listening to).
Some I suggest are
Frederic Chopin (obviously, he's my god)
Sergei Rachmaninoff (ranges from chopinesque romance to modern complex pieces)
Sergei Prokofiev (if you're interested in sarcasm in music)
Felix Mendelssohn or Johannes Brahms (if you like Beethoven)
Dmitri Shostakovich (powerful large-scale revolutionary stuff)
Claude Debussy/Maurice Ravel (if you enjoy romantic impressionism)
You know what, if you wish, feel free to IM me and I can provide you with plenty of songs. I have a ridiculously large library of music I can share with you.
Screen name is in my profile