Personally, I wouldn't go, mainly just because I don't believe in violence as a means of solving a problem, at least not in the long term. No matter who the enemy is, us killing them is more likely to give them more reason to want to kill us back, not to make them stop. It might temporarily beat them down into submission, but if we ever want lasting peace in this world it isn't going to come at gunpoint.
I know people aren't big fans of moral relativism, but I think it is kind of hard to determine right from wrong in these situations. In my opinion, killing is killing, no matter what the motivation or supposed justification. They say they're right and we're wrong,and we say the opposite. We're all equal human beings more-or-less, so who can judge which side is correct?
In a way, I do wish there was still a draft though. At least that way it would anger people enough who dislike war so that these conflicts couldn't continue. Instead, the volunteer system allows these wars to be pushed to the back of peoples' minds due to minimal media coverage and little to no personal sacrifice by the average American. Wars simply don't hit home anymore, and I think they should if we are going to go out of our way to wage them.