Urinals are quicker to use than a toilet stall. Plus, the stall door gets in the way. You either have to hold the door open or close it behind you but deal with it resting against your back since it's not completely shut. Stalls are also more difficult to use when you're drunk. You have to worry more about precision aiming, which can be difficult when you've been drinking. It's too easy to get the seat wet. Question: if you guys get a seat wet in a public/bar/restaurant toilet, do you wipe it up?
What I don't like, though, are the urinal troughs that older sport venues often have. Those are essentially those giant metal tubs that everyone pees into, together. They are against a wall or, worse, right in the middle of the room where everyone surrounds it. Those actually make me uncomfortable. I can't remember where I was but I remember being horrified seeing one of those "middle room" ones.
Speaking of rules, there needs to be a 9th:
9. When stepping away from a urinal, turn away from the person next to you, not toward him.
* if both urinals are occupied, do the "back off and turn" maneuver.
There should also be an extra, bonus, rule (which would apply specifically to urinal troughs): Never cross streams!