I go about once every 2 months. Usually stay at Pallazzo or Venetian when comped rooms but I always get free rooms at Caesars, Flamingo or Harrahs, even the new place Quad. Flamingo always gives me lots of food vouchers and game matching.
I love all of the Harrahs/Caesars properties. Caesars is my favorite. The Quad is pretty nice, they really cleaned house on that dump, Imperial Palace, which was the first place I ever stayed in Vegas. Shit was $25 a night,$45 on weekend, lol.