I like power metal, as long as it's not too fast. I'm more of an 80s mid-tempo guy and 16th note repetitive double bass drumming and fast, scootching guitar riffs just turn me off. I don't mind if the music speeds up for brief periods, that's cool with me. I love Wuthering Heights and Kamelot, and they have speedy parts to them. Mostly, out of power metal, I like the more mid-tempo bands like Brainstorm, Tad Morose, and Cage.
I also like prog, but only if it's not too prog. Never did get Dream Theater, and I am not impressed with instrumental wankery. When you sacrifice melody and good songwriting for the sake of wankery, you've gone too prog for me. That said, most of my favorite bands fall in the prog (metal) category: Savatage, Ayreon, Evergrey, Orphaned Land, Dead Soul Tribe, and Therion to name a few.
NP: Queensryche - Rage for Order