yah narutos not much for the diplomatic leader type...
as you see in the whole zabzua saga he gets way to involved in whats happening on a personal level, and then makes rash decisions that would normally fail, but by some stroke of pure luck succede

in other words hes a great fighter, but thats not what a hokage is, a hokages a political leader that the other ninjas turn to for advice... and naruto just doesnt fit that very well... yet.