Keyboard Switches

I keep hearing about different types of keyboard switches (greens, browns, cherry red, etc.) and I was wondering what the difference was between them. Is it just a matter of personal preference or something else?

Sorry to sound dumb but thanks for the help in explaining this!

https://www.youtube.com/watch?v=2OfUAQiIOWQ 

 

The Internet my friend it's a beautiful thing.

http://www.overclock.net/t/491752/official-mechanical-keyboard-guide