Eh I thought of a few others while reading through.
...You can do situps till the cows come home, but pushups make you cry.
...In the trainers room when you weigh yourself, the other sports teams become disgusted.
...You can estimate not only how far you could pphysically run until you fell over, but you know the pace it would be as well.
...Your shoe collection cost more than your car.
...You find very few dates, because most chicks you meet are joggers, and you try to pick them up by saying "nice form".
...Your aspirations involve 60 quarters at 62-64 pace.
...You know someone who has actually done 60 quarters to fulfill their aspirations.
...You finish 15 miles and feel cheated that you didn't go for 20.
...You know that two-a-days are not for mileage purposes, but to move the lactic acid from your legs.
...You ran down the highway after Sunfair '03 during the massive 4 hour accident cleanup. (Had to be there, but considering how many teams were stuck in that backup Im sure someone will get the reference)
...You prefer to run at night, because 6 minute pace is so much easier then.
...You only know the nicknames of the people on your team.
...You know the nicknames of people from other teams.
...You think Pamela Anderson isn't attractive.
...You contemplate getting a tattoo on your upper right theigh so people watching the track can see it through your shorts split.
...Your only two haircuts are either neo-nazi short, or unkept for 4 months.
...After a race you are able to sleep through a nuclear weapons test.
...After a race you smell like a biological weapons test.
...You can tell that the guys running in the Nike Free commercial are paid actors and Alan Webb.
...You look for interships in Boulder Colorado.
...The only part of training you dread is stretching.
...Puking during a workout means eat less earlier.
...You spit on yourself and don't care.
...You have graphed your PR progression during class.
...You can trace the paths of your favorite courses from memory.
...You find a flat 5, 8, or 10k all dirt, or grass path loop, and have an erection.
...You wish your parents had made you run to get the mail more often as a kid.
...You contemplate going hiking with your dad, but run to the summit instead.
...You used google earth, or map quest more often than a bus driver.
...You envy your siblings who had you to follow, and are faster now than you were then.
...People ask you to flex and you show them your abs.
...You consider the lack of abs a beer gut.
...The most drunk you've ever been was after a beer mile.
...You consider running with a shirt for pansies.
...The running scenes in movies just aren't realistic.
...When asked what you did today and respond with "10 miles easy", you walk away because you don't want to hear the obligatory comment about how far it is.
...You crap out at the last race of the season and do a hard 10 miler the next day to vent.
...You don't have many non-running friends, because no one else will listen to your "awesome stories".
...You have to piss before class, and just wait it through because you can.
...You want to run right now.