Who has the clicker on?

I do. Gives some feedback when scrolling, makes it easier to navigate IMO.

Mine's on ATM, but only because of the novelty, really (first 'pod). Although, I do like the feedback, too, so it may stay on....

Off, doesnt help me navigate at all and its rather annoying.

I do. Gives some feedback when scrolling, makes it easier to navigate IMO.
Me too. I really like that the clicker on the Classic is so quiet. It gives me some feedback without being annoying. The clicker on my 5G 60 is really loud. I always had to turn it off at work or when listening in bed when my wife's asleep. The Classic clicker is so quiet that I leave it on all the time.

I have it off because it can use it in math class and I'm worried that it's distracting other people form there work. Is there any battery difference with it on or off?

Mine is off always.

I like it on - of course the one thing i dislike is that it also plays in my headphones and that is very annoying. i wish it only played trough the iPod itself.