Shamelessly stolen from another forum.
You have multiple bikes in the garage and sometimes have trouble deciding which one to ride to work.
Given the choice between going to a cookout or staying home to work on a bike, you'd rather work on the bike.
If you work out in the shop too late into the evening, you're too wound up to go to sleep right away.
After finally coming in for the night, you're still thinking about the repair you were working on, and find it necessary to go out into the shop one more time to check something again. In your pajamas.
You're rather spend money on a bigger garage/shop than renovate the kitchen.
The bikes in your garage are your "babies" and they make you proud.
When a package containing motorcycle parts is waiting for you on your doorstep when you get home from work, you feel like a 6 year old on Christmas morning.
Your idea of the "ideal" shop would include a bathroom and bed.
The car in the driveway (no room in the garage for it since it's full of bikes) is your alternate transportation.
You can't understand why people say, "You can only ride one bike at a time. Why do you need so many?"
You find it very easy to spend money on parts, but difficult to buy new shirts and pants.
You find that rainy days aren't so bad - if you can't ride, you can wrench!
If you find that more than three of the above describe how your mind works, then we need to start a support group and get help. Oh wait - that's what this forum is for!
