Granted that my information is about 20 years old, but here goes;
It was not uncommon to see a few AF types at Ranger school, mainly those that were going into their spec ops pipeline. There were fewer Marines, and I only ever remember seeing one person that was a Naval Aviator that got his tab. He was a former NFO, and according to him had been DQed after having an inner ear problem that ended his Navy days.
He then went Army, and became an infantry officer, where going to Ranger school is pretty much mandatory.
I would say that if you become a Naval Avaitor that the last thing that you would want to do is go to Ranger school unless it was necessary. I don't really see where it would be helpful to you other than the satisfaction of completing the program. To me, the skills that you would gain in small unit patrol would not outway the chance that you would get hurt in such a way that your day job would be in jeopardy.
All that being said, if you get to go, arrive ready to go, and watch out for snakes.