I almost never use the Dock. Cmd+Tab for app switching, Launchpad for launching. The Dock sure looks nice, and that animation was magical 20 years ago, but I hate how it interrupts the cleanliness of the desktop.
It's a severe case of form over function and the worst launcher-task manager of any current desktop GUI. The only worse one that I've personally experienced is Windows 3.1. (Early 2000s twm or fvwm or whatever don't count, right? They weren't even trying.)