I am pretty much 100% certain that I'm going to join the British Army. I'd like to join as an Officer in the Parachute Regiment, and I'll be taking a scholarship next year for entry to Sandhurst, where they train officers.
For me, I seek something that I can completely dedicate my life to, while doing something good, all while experiencing a level of risk and adventure that most people never do. I'm certain I'll see some shit that won't be pleasant, I'll probably have to shoot at and kill other people, and I'll run the risk of being shot/stabbed/blown up/beheaded on the internet. But for me, it doesn't matter, because I sure as hell don't want to look back on my life in 30 years and have regrets. I want to live as much as I can, and what better way to do that than by leading men into combat?
Sure, I may die in the process, but better to die living tommorrow than to die in 70 years never having lived.
That's my reasoning, feel free to take issue with it, it doesn't matter to me what people think, I'm not joining to impress anyone or earn respect; I couldn't care less to be honest.