What I hate the most is orchestral music. Its not memorable at all in most cases.
It's not meant to be. It's background ambience for the visual action. It's just there to lull you into a mood.
I agree that it's boring. It's also predictable. You get "swells" before action starts. You get "BOMP BOMPS" at the end of an action scene. You get insipid twilling and fluting in walk-arounds. It's mindless.
Not that orchestral can't be great. Obviously soundtracks like Star Wars or Super Mario Galaxy are incredible and memorable, but the way most movies and most AAA games use orchestras is lazy and uninteresting.