I don't always get the opportunity to sit at the front of buses but each time I do, I don't take it lightly.
You get to see everything from the Driver's point of view.
If you are someone that likes to take authority, take charge, then sitting at the front is probably your best option.
It enables you see what's happening before those at the back even know that there's something happening.
The comfort it provides also is another reason people would love the front seat more.