I just realised that I haven't even answered the question that this thread was about, haha
1. Don't Leave Me Now (Roger's voice is beautiful on this song, anyone who says Roger's a bad singer obviously needs to hear this one).
2. The Final Cut (My uncle committed suicide to this song, so it means a lot to me. I also love the lyrics. They paint the perfect picture of depression).
3. The Gunners Dream (My crying song).
4. Embryo (An underrated gem).
5. Shine On You Crazy Diamond, Pts. 1-9 (Those four notes... and Rick's synth solo in part nine).
6. Echoes (That one note... and that chromatic riff. You know the one. If you don't know the song but you know Phantom Of The Opera, you still know the one).
And finally...
7. Two Suns In The Sunset (It features, in my opinion, the greatest (not to mention brutally truthful) line ever written, better then anything Bob Dylan or John Lennon have written; "Ashes and Diamonds, Foe and Friend. We were all equal in the end").