I grew up shooting all kinds of things that I thought were interesting, didn't really matter what it was at the time, but it was all just practice, playing with light, really very general stuff. I shot a lot of sports, mostly football, and still consider shooting sports as the toughest field to be really good at. I've done a lot as a photojournalist, which by some standards is the same as a "jack of all trades" only the good ones, at good at most and great at others. Being a good photographer is understanding how light works, how content in an image makes the image. I've been helping out a guy for a few weeks now, he likes sports, so he shoots football as he knows that's where he'll find me, but he hasn't got a clue about light. I explained a few things to him and what he should look for, I'm pretty sure it's helped.
Two weeks ago I hired a very good glamour photographer, that has also been shooting football for 15 years to cover a game for me. He gave me a disk with 1100 images, once I weeded out all the garbage, I was left with 96 images. I was shocked. Unfortunately I have hired him(before I got the disk) to cover another game next week, but will be having a chat about what I want. I'm guessing it was just a bad night for him, it happens.
There is nothing wrong with shooting a bit of everything, figuring out what you enjoy the most is key and then go in that direction. If it's a matter of wanting to become a full time professional, you have to look into the areas that are more stable for income, and that's not always going to be what you enjoy doing. I have a new grandson, been shooting all kinds of images, better than the majority of baby photographers out there, a friend suggested I try selling that side as well as the sports. The thing about that was it was done without a studio, in the house, candid pictures and they were done for me. It wasn't any different from shooting sports, it still came down to the light and content. The basic requirement for a decent image.
I just take pictures