I think it's pretty annoying that Chrome doesn't use the system print dialog by default. It repeatedly confuses the less savvy users where I work.

The chrome print dialog is totally broken for us. It always tries to use the wrong size paper from an empty paper tray. We always need to click through to the system print dialog. I need to tell people to do that every single time because they forget every single time. I should switch everyone to FF just for that.