When I play at a house party you are going to hear everything from top 40 hip-hop to 80's hair metal to classic Chicago house. Otherwise it's boring. I like to think I sound like myself.
After hearing Mix Master Mike on "3 MC's and 1 DJ" I got a Numark starter kit and started buying hip-hop records. After hearing Paul Oakenfold's "Tranceport" I started buying trance records, then house, and eventually drum 'n' bass. I like to buy and play everything because that is what DJs should do.