Carly's dad took us to see Bruce Springsteen and it was the best possible thing I could imagine, even way up in the nosebleeds (just like Dave B mentioned, actually). Bruce is probably my favorite musical artist of all time, and he's also one of the great live performers of all time, so a lot of things that normally bug me weren't even close to an issue.
I also saw Leonard Cohen, but that was more of a religious experience than anything else. The man's true genius is as a songwriter, not performer, but just seeing the man on stage in a classy theater, singing "Dance Me To The End Of Love" gave me incredible chills.
Also saw The Mountain Goats live. They were alright. Sounded fine, but again, they're a band I appreciate more as songwriters than performers.
I think in general, I'm a lot happier, more well-adjusted, and saner than I was in 2008, and I could probably enjoy concerts a lot more under the right circumstances. I love live music, but I still prefer the much smaller venues. I performed as part of a giant cover set show (as guitar player for a Half-Japanese cover band) at a VERY small venue (bout 30 to 40) and there was a Fleetwood Mac cover set that was so above and beyond any music I had ever heard live (Springsteen aside) that it still gives me chills thinking about it.
The other bands I really want to see live are The National and Okkervil River, and will jump at the chance to see them perform. Apart from that, a vast majority of the music I love isn't very current or would be too expensive to bother seeing live.