everyone i know personaly, laughs at me for having a filter
to some extent i agree with them, your engine "eats" much more junk from the air than it does from your fuel
i bought a filter when i started up because i drive model boats and i often see junk floating in the tank because i pour the fuel in w/ a funnel which collects a lot of dirt and such.
in a plane though its just another thing to fail, i had mine come off during the second flight of my gp rapture resulting in a deadstick into loosely packed ( thankfully not frozen) dirt
and someone else ^^^ also said it caused deadsticks, which could cause more trouble than its worth.
the way i look at it is that engine will more likely have a fatal crash before it wears out.

in the end do what ever floats your boat