I haven't been to a big or semi-big concert since Hostile City DeathFest 2010 last summer. I only went for one day of the 3 day event but those 12 hours of local, national, and international death metal ruled my world. Headliner was Hate Eternal, but I fell in love with (and befriended) Strychnia and Abnormality.
Otherwise, I mostly just go to local shows. I'm a huge fan of basement shows. One of the most recent shows my band Kryovax played was a basement show at an abandoned warehouse in Philly. That was one of my favorite shows I played. Bucket Flush headlined. It's crazy to think that my wet behind the ears band has played with major Philly punk bands like Combat Crisis, Population Zero, Common Enemy, and Bucket Flush.