I did my three years in the US Army and I am not biased. Still, I doubt I could have taken three or four years in the Navy. I have to have my feet on solid ground and need to be able to walk around on something besides steel. I do love the ocean though. Just not enough to live on it. Try to make a choice based on what you'd like to do in life. The "career" they prepare you for in the service may not be applicable when you get out, but if it's something that interests you, it can make your time served much more tolerable. And whatever branch you choose, do not expect time served to be very tolerable. It's not supposed to be. Combat is as intolerable as it gets and they are just preparing you for it and trying to keep you prepared.