We used stick butter for awhile for everything, but I was buying three pounds of butter every two weeks.
We've since gone to a butter+canola oil spread for toast/other spready things which we like because it doesn't have to sit out at room temp and therefore doesn't get spread on everything. It has 5 ingredients, and I really like it.
For cooking, though, I'll use butter, canola oil, olive oil, or grapeseed oil. No margarine or odd things like that.