Depends. There's a very good, very butter tasting vegan "butter" (it's margarine) that I use a lot nowadays. All depends a bit on what's on sale too.

Often we use a margarine that is a mix of butter and oil, not sure what is is techically. I've also made my own margarine from butter, oil and water and it's very easy to make and pretty nice. Having something soft for bread is preferred, but I tend to cook and bake with olive oil, removedseed oil or butter.