What's an innocent misconception about your hobby/profession that drives you up the wall?
Like for example, how someone thinks because you work in IT you can fix their TV, or how if you're into music you must be able to play any random instrument.
I just like hearing pros rant about about their very niche problems.
I cook burgers. A lot. I cook them at parties, graduations, weddings, etc. Won a contest to be on a cooking show; I'm not saying I'm the best, but I know my stuff.
When people assume you're meant to put ketchup on a burger I want to rip my tongue out.
For the most history-accurate hamburger, mustard is the only condiment, with onions and pickle being wonderful complements. Ketchup was used to entice kids into eating hamburgers.