LIM, I have a fetish over the sound of electric motors starting up. Even though Ive only actually heard them on one coaster, chiller, its still a pretty awsome sound. Ive never heard an LSM in person, so I cant judge. Ive also never ridden one. And besides, they dont have the accleration values as LIMs, but they do have the people capacity. So LIM wins it for me.
Yeah hydraulics are fast, and theyre neat with the copper fins and the slight backwards movement the train makes to connect onto the launch, which scares the crap out of everyone. But all the hydraulics, cables, etc, are hidden for the most part from the GP, so theyre less enjoyable for me.