Title says it all.

Name me 3 songs and the reason as to why you'll miss them?

Mine would be:

No One Knows - that song is just a blast to play
Dead End Friends - to this day I still wish they'd picked Mind Eraser, but this song is cool nonetheless
Fly Like An Eagle - I don't really play this song that much, but I always seem to like to hear the preview of the song because it just sounds so hypnotic and cool