Last: Don't know if it counts, but Trans Siberian Orchestra a couple of Christmases ago. This is the group with the strobes, flashing lights, and spotlights set to Christmas music.
It was really well done, but they have warning signs for epileptics and migraine sufferers at the entrance for a reason. It was what the brain must look like during a seizure

. It's probably not something I need to do again.
First: Linda Ronstadt at Blossom Music Center with my brother. He's a lot older than I am, and rather than take a date, he took me (age 12). We had a great time.
Best:Chicago and the Beach Boys, Fiddler's Green, Denver. This was post-Dennis Wilson and Terry Kath, but sounded exactly like my childhood memory. It was also a beautiful site.
Worst:: without a doubt, Molly Hatchet at some club, Dayton, Ohio. This is a Southern Rock group, very loosely compared with Lynyrd Skynyrd. I like Skynyrd, but the genre itself isn't my favorite-I was with an ex-boyfriend. The club was hot and crowded and I could not see. This is why, if I can be outside for a concert, I much prefer it.
So far, my daughter has seen Justin Bieber and Taylor Swift. I was gladly in the parent's room for Justin, but now wish I'd seen Taylor Swift with her (she was with a friend).