i tried to get into dream theatre quite a few times, but i'm just not a fan of heavy metal, and by that i mostly mean i just don't like the lyrical component of it. i was actually eventually able to convince the old man that i was right about the vocalist being terrible, and that the records would be more listenable, as instrumentals.
on that note, a few years ago, i was able to find a totally instrumental version of their complete discography, taken from japanese imports, and i can report that i was finally able to enjoy the records, even if i never went back to them.
there's actually a large amount of music in the intersection of prog and metal that i have this view about.