Arma has loads of excellent hotkeys like the CTRL-W-D for raising your firing position above your shoulder. Ctrl-Alt-Q-E will allow you to double take lean. And who could ever forget the useful CTRL-SHIFT-W-S-ALL-D hotkey for waving to a buddy, you can also add a CTRL-5-pre-hotkey modifier to change it to a slightly friendlier wave. A lesser known but still useful hotkey is the CTRL-ALT-P-Q-B-B-Q-F4 hotkey combo for staring at your battle buddy's ass that takes both the CTRL-4-H-pre-hotkey-modifier and a TAB-SHIFT-6-post-hotkey-modifier that make it gay and/or awkward respectively.