One essential thing to good stories are interesting characters. Especially the lead. So, my question to you is: What makes a character interesting?
Is it their profession? Is it their past experiences? Their personality?
What if you want your main character to be an every day, average Joe? Will that, then, not make a good story?
Think of one of your favorite books and tell me: What makes the MC interesting to you?
I'll start. Jane Austen's "Sense and Sensibility" is full of interesting characters. What makes the two main sisters interesting, though, is how they react in contrast to each other. (The one sensibly, and the other not.)
So... maybe what makes a character interesting is the way in which it relates to the story being told? For example, a cop might not be an interesting character in, say, a story about fairies... but would definitely be a more interesting character in a crime-thriller.
I'd love to hear your thoughts and observations!