Hmm, I thought about joining the marines (a few years ago) but just went to college.
I think that I would be a good soldier: I could be trained to be lethal, but I'm not violent. Lethality is about skillful execution, while violence is about being in a sort of crazed emotional state (like vengeance). Or at least I say that sitting in my ivory tower (pretty views, btw).
Of course, I suppose it is strongly unappealing for me to go out and kill other people, when at times, your only reason is being ordered to do so. It's not the killing part so much (this is, of course, still in my ivory tower) - if some jerk off the street was trying to kill me and I had to kill him, then I wouldn't have too much issue with that. But that's my last option.
To put it another way: I don't care about the uniforms involved, so to speak. If someone is shooting at me or my friends, and I'm armed, than I'll ensure that they will stop. I don't care who they are - soldier, militant, psychopath, next door neighbor, drunk uncle, whatever.
If there are bad guys planning to do bad things, than I don't mind stopping them either.
I'm NOT into just shooting and killing people for reasons that don't involve immediate danger. Simply because they are "the enemy" and have on a different uniform doesn't really do it for me.
Ideology seems like a silly reason to kill someone, but a good portion of world history disagrees with me.
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On a side note, I'd be interested in something like SWAT because it has less of the negatives of military (like shooting people for no good reason)*. SWAT has a hierarchy, I don't think I'm uncomfortable with that, though the idea makes me feel sorta off.
*Of course, hearing these stories about raids where they get the wrong house and shoot the family dog or kick in doors and shoot and paralyze because someone has some pot makes me second guess this.