You know you're a backpacker if your tanline starts at your wrists.
You know you're a backpacker if you say to yourself, "Yeah, I can use this underwear another day." (after 3 days of hard hiking!)
You know you're a backpacker if you look at your poop and say, "Oh, that's interesting."
You know you're a backpacker if your worst day on the trail is better than your best day at work.
You know you're a backpacker if you look at a map and think, "Yeah, but how far is that in 'TRAIL' miles?!"
You know you're a backpacker if you bathe and do your laundry while still wearing your clothes.
You know you're a backpacker when it takes three hours for you to finally realize that weird smell is "soap"
You know you're a backpacker if you catch yourself watching your foot placement - on a sidewalk.
You know you're a backpacker if when itemizing your budget, you say to yourself, "... new boots... trail food... and if there's anything left, I'll pay the rent!"
You know you're a backpacker when you ask your 10 year old daughter what the base weight of her school backpack is.