It won't seem fun to you after you do it for awhile.
Seriously, it seems all fun and games, but after awhile you'll realize you're in it for the money. And don't ever forget that you are. The profession depends on that attitude.
However, if you are a second lifer, go for your goals. You'll never be happy, like many of us, unless you are flying airplanes. And for some, they're still not happy.
As a returning furlough said in one of my recent classes, "We all talk about getting out. I was there for 5 years. This is not a bad job."
Good luck.