I'd love to hear Johnny Quest. It was the first song that got me into LTJ back in 1998 or so. I was into metal but the fast pace and groove of that song opened my eyes to more ska/punk. I remember going to see LTJ with Anti Flag and Teen Idols a few years later, but I haven't seen them since... would love to relive that show again.
I saw Less Than Jake on my 18th birthday back in 2007. Every time I hear the song "Look What Happened" it always takes me back to that day, one of the best days of my entire life. So I'd love to hear them play that, and I hope I can score tickets for the Chicago date!!