I used to be one of the "Americano with cold milk" brigade. However, I could do the order on autopilot: "Grande Americano, not filter, takeaway cup, please, (big smile) room for cold milk, cold milk on the side, no thanks, I don't want anything to eat, no honestly that's all. Yeah, you have a great day too."
My pet hate was the constant hard sell of dried-out, tasteless cardboard food that any self-respecting chain would be ashamed to sell).
All of this is in the past tense because I discovered tea about a year ago and can't live without it. I have therefore given up on coffee shops. Don't get me started on why they charge more for a large tea than for a regular when it's one tea bag in both.
Now, if you really want a challenge, try finding somewhere that will serve you a proper pot of normal tea. As in: teapot that doesn't flood the table, PG Tips and a drop of milk on the side. Now there's a proper quest.