Ironically I flew a trip that went through ATL a few times a couple weeks ago and we crossed one runway and we were lined up with the ramp we needed to get to with exactly one little taxiway intersection to get through on the way to the ramp. We both decided we shouldn't really just go to the ramp until ground says so, even though it was obvious we were good to go. We stopped and set the brake until there was a chance to get a word in to the controller.
Of course, we got clearance into the ramp in a very pissed off tone. Guess what -- next time, I'm stopping and setting the brake again.