If someone hadnt heard them before, I would go with "Under a Glass Moon" or "Take away my pain" as those are my two favorites. So many songs of theirs are so damned good, its unbelievable. Scenes from a Memory is such a good album that I cant let someone not hear that.
Obviously anyone has their own opinion about any band, but how can you dislike one because you believe they are classified in the wrong category? Dream Theater is composed of some amazingly talented players. I personally dont see them as a metal band so much, but more rock. (Progressive of course) I will agree that Train of Thought was a harder, metal album, but that was something the members of the band wanted to do at that time. Octavarium went right back to a original sound. But thats part of this style of music, changing it up some each album. Who knows what the next album will sound like.
And whats the big joke about seeing them live? I have now seen them twice and thought they looked like any band playing on stage, just much better than the opening bands(Gigantour). The only thing that made them suck and the Evening with in Phoenix I went to earlier this year was the sound system in Dodge Theater...horrible, but it was still a great time.
-C