I jumped ship about halfway through college, thinking I needed some kind of adventure or just a change of pace. For better or worse, I've gotten that. At the same time, I'm not entirely happy with where I'm at, and I'm stuck with it until I'm almost 27.
If you feel like you need to try something new, by all means go for it. Just do you research first. You could find yourself locked into something you hate. Someone already suggested the military, and that can be a good choice. Just understand that once you sign that contract, they own you for the next four to five years. And being older, getting bossed around by some 18 year old kid fresh out of high school, gets old real quick.