check the old threads. i'm a happy revelle graduate, and have mentioned this various times before.
there's a spot for "other preferences" given on the application; you can always try to put that, but no guarantees. the only surefire way i can think of is to say that you're anticipating surgery later in the year, may need an elevator for convenience, etc. i believe this would even remove the first-floor fleets from the pool of possible suites, as those are actually a few steps below ground level.
I'm also going to be in Revelle as a freshman this fall. Here's what I've heard:
Housing - Not as aesthetically pleasing as other colleges, although it is more spacious (which is more important IMO). Apparently the dorms are close to the lower div science buildings.
Food - Mediocre, but not terrible.
GEs - Revelle does have the most GEs, but a lot of them may overlap with your major depending on what it is. HUM is the only one that people seem to complain about, I hear it's a GPA killer...
I seriously doubt UCSD would want to screw over 1/6th of its students by making Revelle terrible.