I think the first one will hit home for far too many people on this board:
-When Spring rolls around you plan your garden around things that you can later put into your beer or ferment.
-You go into a home improvement store and ask where the "brew shed" section is.
-You go to the Bull and Castle for a pint and bring along a bag of spare John Guest fittings "just in case someone needs one".
-You have a homemade device for removing beer keg spears.
-You open your closet and realize that you don't need to think too hard about what to wear today: brewery tshirt, brewery tshirt, brewery tshirt, WAIT, yea, another brewery tshirt...
-Your beer gets infected by some unknown microbiological life form and you post pictures and tasting notes on Beoir.
-You actively sign up for and are excited to receive "spam" from home brew stores.
-Lidl sales on electric tea kettles and camping coolers mean you have to drop what you're doing and rush to the store immediately!
-You know the exact number of kettle elements that can be plugged into each electrical circuit in your house without popping the breaker.
-When someone starts a story about a "friend they knew" who "brewed a lager in their bathtub once" you grit your teeth because all your hear is the sound of finger nails scratching across a chalkboard.
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Adam