Mashed Potatoes? How Many Ways?

I love mashed potatoes.

There's no doubt about that.

And I make them several ways, but how do you make yours?

Regular mashed potatoes = milk and butter
Special mashed potatoes = cream and butter

Then sometimes I add goat cheese or feta or chives or basil or whatever else I can get my hands on.

But you know, everyone makes them differently. So, how do you make mashed potatoes and what's your favorite thing to put in them?