I guess the main one for me would be a band I hope will one day return and tour again, and that band is Fugazi. Had two chances to see them when I was younger and missed out on both.
The rest of mine are artists that are always too pricey for me when they come around, Prince and AC/DC, and artists that I do not believe have made it to the US, Light Bearer and Feastem. I'm tempted to also include Black Flag, but I guess I'll technically be seeing two different versions in the coming months. I just wish it was the "Damaged" line up. I also wish it was in 1981.