I run into the idiomatic, or even "regional dialect", issue all the time. I've had many coworkers look at me like I'm stupid when I ask them how they like to implement a certain, basic algorithm. It's not that I don't know how to get it done, I'm just wondering how they like to structure their code, as I find it more important to match style than impose my own, generally speaking.

If I don't have to match styles, and can just write the code as I feel like it, I can work so much faster.