Pearl Jam- Smile(I love it and it always makes me feel happy), Yellow Ledbetter (as does this one), Down (its one of their newer songs, its on the Lost Dogs album and I think its also a single), Given to Fly (this one probably tops all the other Pearl Jam songs for me), and lastly Oceans
Smashing Pumpkins- Today, Tonight Tonight
Dave Matthews- Everyday, What Would You Say
Steve Miller Band- Space Cowboy(not a huge fan of the band but it is an awesome song and always makes me happy)
Proclaimers- I would walk 500 miles (
)
Who- Baba O'reily
Beatles- Ive Just Seen a Face
...and thats it for now
**edit**
Missed that on the second page, Sittin on the Dock of the bay is an awesome song, good choice