dance music. hardstyle, trance, tech. not so much dubstep anymore. really old tiesto, PVD, headhunters, JOC. carl cox, Umek, claude von stroke, deorro, also some electronic jambands, biscuits, lotus anything with a beat. im a HUGE phish phan but that doesnt always do it for me in the gym i find myself spacing out in between sets and wanting to dance and twirl in the corner rather than lift. I also listen to a lot of psy-trance and psy-dub. sphongle, hallucinogen, blue tech, the crystal method. check them out. its some weird ass shit. music makes or breaks my workout. If i forget headphones and am struck listening to shitty ass gym music i really dont enjoy my lifts.