Re: Concerts that surpised you as to how good the band was
I'd have to say seeing the White Stripes back in 2003-4 was fabulous. Loved them before the show but the live experience took it to another stratosphere. Plus Meg White was way better than I had expected.
The Black Crowes in early 2000? They opened for Lenny Kravitz and stole the show. Lenny was obvious not happy having to top their set. Threw a tantrum over an untuned guitar after his first song... :)
And finally, (nod to Bermuda) Weird Al about 10 years ago. Surprised that the band was as tight and talented as they were. Nothing to joke about...