As a soldier currently deployed(US Army), I have this to say to a few things I've read;
If you want to join the armed forces, that's your call; however, anyone who says soldiers are trained to kill is correct... only the emphasis they place on it makes it sound like we're a bunch of child murdering sociopaths, and I'm not a big fan of that classification. I also notice people are talking about the rights and wrongs of this war, and I couldn't give a damn what is right and what is wrong when there are people over here fighting to protect me; I joined up to help them, regardless of any political affiliations.
Would I recommend joining the military? That's a case by case thing. A baby on the way and a pay cut? Financially speaking, it's not the best move; but the chance to safeguard the world your baby daughter is coming into is a liberating feeling... I feel good knowing that I'm doing my part to serve my country, like my father before me. After this war is over, whatever happens, I know I'll have done something besides complain and watch people die in my name.
As for the comment by the british soldier, I can only surmise that more americans have died because Americans have committed so many more soldiers to the war, running more ops, and a mix up on the part of british and american commanders speaking gets people killed. All in all, it's good to have you guys over here; we love you guys