Being picky about unimportant details and making other people miserable as a result of your own pecadillos: Edition: My wedding.
This story is one of my favorite "Gotcha" with my mother's critical nature. When I got married, she was determined that I had to go to a certain shop, "Borgias". She had bought her mother of the bride gown at Borgias. I told her I was not going to Borgias because everyone I knew who bought a gown there had problems with it arriving on time and lousy customer service (I truly have no idea how they stayed in business as long as they did). Also, my parents were paying for my wedding and had given me $200 total for gown/shoes/veil -- which was totally inadequate to begin with -- and Borgias was very expensive and therefore I couldn't afford Borgias.
Major fight ensued. She also had a particular style in mind for my gown that was not going to happen. So another fight ensued, "But that's the only REAL wedding gown style!" Yaddayaddayadda. I went to Another Store and bought the gown I wanted, mostly with my own money. Cue my mother's negative comments for MONTHS about, "I can't believe you didn't go to Borgias! I got my mother of the bride gown there! What will people think if you don't get your gown there?" To which at one point, I retorted, "That YOU are cheap?"
Fast forward to two days before my wedding when my father calls me. My father on the phone is cause for great alarm because up to this point, he had NEVER called me on the phone before. He hurriedly and in a whisper tells me that. "You were right about Borgias. Your wedding is on Saturday and your mother's gown is not in and they don't seem to care. Your mother is freaking. Bye!" My mother calls a minute later and announces that we have to cancel MY wedding because HER gown is not in. "Yeah, not going to happen, Mom. YOU were the one who insisted upon going to Borgias even though I told you of their reputation. This is your problem and your problem is not going to stop MY wedding." It's not charitable of me, but wow, did I enjoy that moment.