Every morning when I go downstairs to get coffee at work, someone is there ahead of me, coffee cup in one hand, milk jug in the other, pouring and stirring and tasting as if s/he is going for first prize in the World Coffee Mixing Championships. (Brought to you by Starbucks!) Three drops of milk; whirl with the little wooden stick; sip; wrinkle nose and repeat ad infinitum, all while blocking the entire coffee area and preventing me from getting my cup of black decaf. Every time, I want to shriek It's coffee, not a chemistry experiment! Dump in the milk and step to the left! I don't care if you spend your morning concocting the perfect blend when you're at home, but in a public venue, your job is to do your business and clear out as quickly as possible. The same goes for restrooms -- no hogging the sinks for half an hour while you brush your teeth, apply makeup, highlight your hair and wax your upper lip -- and any sort of line at a cash register.
Ah! That was cathartic. I feel better now.