What opinions do you have that you consider (shallow && pedantic)?
On accident
I kind of can't take people seriously when they say On accident, I don't know or care if its more or less grammatical, it sounds like a child sputtering in my mind. It should be By accident or accidentally
You're incorrect, "expresso" in French is pronounced /ɛk.spʁɛ.so/.
I'm a snobby barista, so I stick to the more Italian-like prononciation even when speaking French, but the French word expresso is pronounced as its written.