No one can answer this for you. It's about where you'd rather be, in the Navy or Air Force. I will say one thing, and take it for what it's worth. I was an officer in the USAF, and I live in Annapolis, so I've seen both sides (sort of). There are cultural differences in how a new junior officer is assigned in those two branches. USAF people who are operators (pilots, navigators, air battle managers, missileers) generally are responsible to learn their weapon system as a priority, and don't get additional leadership or supervisory positions until later on. This is not true for USAF 2LTs in the support roles (security forces, maintenance, communications), who start off supervising up to 30 or so airmen. Pilots/other operators in the USAF will not supervise people initially, as they learn how to do their job; however, as they get more senior, the operators will be the ones who get more senior level leadership. Pilots run the USAF at the highest levels.
In the Navy, a SWO or Submarine officer (and even aviators to some extent) will be in charge of learning their weapon system from the start; but, unlike the USAF, USN officers will also have leadership and administrative responsibilities at a very junior grade. The Navy isn't controlled by pilots at the highest levels necessarily (those ranks are filled with unrestricted operators from SWO, Submarine, and aviation), so that is something to consider. I'll let someone who has been on active duty in the Navy chime in with better information; however, I think the Navy spreads the wealth a little bit better than the USAF does once you are further down the road in your career.
Really, though, it is up to how you want to spend your career. If you like the water and ships...you have your answer, if you prefer to be ground-based and work with air assets, you also have an answer. One of the posters said (or implied) that the USAF has better bases. The USAF is famous for having the best facilities for its people, but this is subjective as anything else is. In the Navy, you'll probably live by the water. In the USAF, you might get lucky and get t live in Germany or Florida, but you might end up like I did in Minot, North Dakota. Each service has its pros and cons, and as others have said, it's up to you to decide whatever your goals and interests are. On a personal note, there isn't a town prettier than Annapolis, MD in the United States....that's just the townie in me