Still don't like Vegas that much but I have seen Second City and Mystere... and loved them!! Second City was very funny - great sketch and improv.
And then there was Cirque du Soleil - OMG AMAZING! I've seen them on TV and to see them live was just so wonderful!!!! Liquid muscle in motion. A completely engrossing production. The music, the costumes, the lighting - there are not enough superlatives. I'm so very, very glad I went (and was so tempted to buy another ticket.) When I'm rich I would be so tempted to come to Vegas just to see Cirque.