1. ANY job is a good job to have
2. ANY job is a good job for a 12 year old to have
3. There is NO SUCH THING as a manly job, a real man will work whatever job is available to provide for his family or make his way in the world.
I fully agree with 3. We have allowed media to teach generations that flipping burgers, stocking selves, (nursing for men) was some how demeaning and below them. This is wrong thinking. If someone does good work and brings home the pay, great for them.
At 15? You're lucky to have a job. If you want to smell butch after work, get an outdoor job. If you want to dress up for work, work house for a professional theatre company or be a waiter. Take what you can get at this stage, my son.
Just take what is readily available for your schedule and run with it, dude. That is the Manliest thing to do.
Look to your local park district for a job. Summer's coming to an end, so umpiring/reffing baseball and soccer is probably a no go, but I'm sure if there's an indoor league somewhere, you can apply to ref for youth soccer games.
I'd say secret agent would be a good way to combine the two.
I think it's more important for a teenage boy to learn the value of work, to see the task through to the end, and to take pride in his work and do it well, and not so much the job itself. And, while it's less important, I think hard physical labor is a good place to start.
I would have to say construction. Manly smells all around and you will learn some skills which will come in handy later in life. (It is surprising how many men are unable to use a drill or a circular saw.)
Messy work but you'd be surprised about how many people can't do a decent job of it. Hired contractors to do a bathroom and found I can do a better job than they did.
I was one; you get used to real world real quick;
People don't pay you.
Dogs chase you.
You are out in the rain and snow and heat and cold, early morning.
Welcome to the world of work.
Mowing lawns, construction, waiter, busboy, movie theater, stockboy, shoe salesman, mechanic helper, ...
Basically any job that will hire you would be manly as long as you work hard at it.