Oh man, so many. If I had to pick one it'd be: I Want to be Loved.

I'm torn because I'd love to hear Misunderstood live but not with Jon's vocals during the Iiiii's in the chorus. I guess they could use a backing track but I dunno how good it would sound.

Others:
Story of My Life
Brokenpromiseland
Love's the Only Rule
Superman Tonight
Summertime
Bells of Freedom
Thorn in My Side
I'd Die For You
Hey God
Something to Believe In