Hmmm. Seriously life choice that's for sure but in the end like what hei said it always comes down to what you want. I'll be going in the Military once high school is finished. Who knows maybe if you choose to go in we'll meet each other and never know it. :3

Class of 2016??? If yes then we might see each other

You don't have to be infantry to be in the military- I work on antennas.

As far as weapons: drill sergeants actually prefer people with little to no prior experience- you don't have any bad habits that need to be broken. Usually it's the people who have never used a rifle before that score the highest on their rifle qualification, because they do exactly as their drill sergeant says for shooting form.

I personally love being in the army (although I would prefer the airforce- I went to basic with a LOT of idiots. Pretty sure one of them was seriously half-********)
It keeps you in great shape, gives you a lot of economic support (Btw, you'll be loaded by the end of training; if you're smart enough, you'll also be getting about $600 every month you're in school to pay for expenses, on top of your usual pay and tuition coverage. 95 ASVAB, bitches!)

and most importantly, basic training just gives you a greater appreciation for everything. You're stuck doing whatever your drill sergeants tell you for a few months with no communication with the outside world aside from letters, no entertainment aside from the **** you and your buddies come up with (by the end of it, we realized we were ridiculously easily entertained by anything), ****** food, and spontaneous punishments for what other people did.
You also learn to sleep anywhere in any way at a moment's notice.

It's generally just an awesome experience mixed in with some annoying ****.

Ooh- another thing

A guy at my unit said that he hid contraband in the dryer exhaust, then put an "out of order" sign on the dryer.
If you feel the need to have contraband, be smart with it.

I never had any in basic, though, and wouldn't suggest it either. Basic has way more snitches than AIT does, because people stop caring by AIT. Heard it's a very good way to make money though. One guy bought a bag of skittles (this wasn't even in the barracks, so it wasn't contraband) for $30, so imagine what a tin of chew would sell for with all the desperate rednecks.

Another good way to make money is being paid to take over other people's fireguard shifts.
One guy I went to basic with, from a combination of selling ****, taking fireguard shifts, and betting- not from his actual pay at all, made enough to buy himself an xbone and a TV with it when all was said and done.

While the armed forces is a pretty decent route, I'd encourage you to think about it quite a bit more rather than go for it on the strength of being decent with firearms.