Hahaha, I bet there are some commands that we don't know yet.
Like some people dont know that when you're flying, you can press shift and move mouse to look around - looks great if you are just cruising around in a plane and watching the landscape.
I was watching my little brother playing the other day and I was suprised how he had english team messages while being axis. He told me there is another menu in 'sounds' section, and I was thinknig: wow you've been playing this for 7 years, and you didn't notice that.