Zedius,
Personally, I like having a clean desktop as much as possible so I've found MC to be useful in achieving that. My setup for my Mac is that I have four desktop spaces.**
Desktop 1 is the one that I work from most of the time. It contains my Adobe programs, finder windows, etc.
Desktop 2 has a Safari window that fills up most of the screen that I use for time tracking/project management for work.
Desktop 3 I use for connecting to my remote desktop (Windows machine). I also use desktop 3 as a quick place to jump to if I have multiple windows open on desktop 1 and want a clean place to take care of another task.
Desktop 4 is my music tab, so it usually has my Pandora app or grooveshark open there.
I haven't "launched" the application Mission Control in months (meaning that I don't use the F9 shortcut to show all 4 desktops at once). Unfortunately, you can't have different docks or desktop icons assigned to each desktop space. My work-around for this is taking advantage of folder "stacks" in the dock or using "Cmd + [spacebar]" to launch apps. I have a folder of apps that I use regularly, but not on an eveyday basis (see screenshot). 
You will also notice that I have a folder within that stack that says "Tech"—so you can "layer" folders within stacked folders. There's a helpful article here on MacYourself about stacks. The other solution for launching applications quickly is using "Cmd + [spacebar]" and typing in the app you want to open. It's much, much faster than opening Finder, navigating to the Applications folder and finding your app.
Hope that helps you get a better picture of how MC can be used & that it isn't just a frivilous program. For me, it's the lifeblood of my day-to-day operations that allow me to work efficiently and fast.
-Tia
**I switch between them by using "Ctrl + [right arrow key]" or "Ctrl + [left arrow key]" or I use "Ctrl + [numpad key 1 / 2 / 3 / 4]" to jump immediately from desktop 1 to 4.
