There's no rule that defines what a leading character's attributes must be.
I think you need to look at what you're trying to say with your story. Are you trying to examine the traits of a hero by putting someone with unconventional traits in a leadership position? Or are you just trying to focus on the adventure of the story and use a character that your readers will be able to identify? Or, are you writing as a form of personal escape/fantasy/recreation and would like to see how you would react to a given scenario?
Remember that its best not to state your character's attributes outright anyways. It's better to have the reader develop his or her own assessment based on the character's actions. For example, compare:
A) Joseph P. Canarey was a mean, nasty old man who hated kids.
vs.
B) When my baseball landed in Joseph P. Canarey's yard, the old man hobbled off of his portch, onto the lawn, picked it up and put it in a pail that he used to hold his collection of confiscated toys from the neighbourhood kids. He used to have a dog that would fetch stuff that landed in the yard and bring to the fence where it could be fished out without being noticed. But the dog died last summer and we all knew it was because Mr. Canarey kicked him too much. So when Katie's doll landed in his yard, I knew it was lost forever.