im just curious. personally every time i get gas while its pumping i check all my fluids, check the serpentine belt for cracks/wear and make sure my radiator/tranny cooler doesn't have too many bugs in it.

I check it about once a week. Not so much for level, but for color.

same here. no leaks

once every 5k right before i change it, right now thats usually 2-3 months ish

I usually check it once a week, or after every long trip.

I don't normally check at the gas station (actually I never check there) because my dipstick doesn't indicate actual levels immediately after turning the car on. Am I the only one that happens to?

No. No car can accurately display oil level if the engine has been running. Auto tranny fluid though, that'* the best time.

usually once a month, just to make sure color looks good and not low

my cutlass every 1000 miles as it burnt oil
the grand am never its always clean when i change it and never burns any

Always before leaving town which normally occurs several times a week so I may check it every other time depending on windshield wiper use or if I want to check something else out. Or just want to hear the engine up close and personal. Some are saying keep an eye on the coolant level, so as to avoid losing an engine, soooo that means being very paranoid about fluid levels and checking all of them even more frequently, at least for a while. You know how that goes.