The problem with Picard is his nepotism approach. He lets Crusher's boy play on the bridge and gives him a regular bridge shift.
Imagine you're a security officer and Yar dies. Who does he promote to that new position? Someone who wasn't even in security! Same for throwing La Forge into the Chief Engineer spot when he wasn't even in the engineering department!
I voted for Sisko since he made Nog actually work for his position.