I have yet to get to the point where I am buying spices in bulk (because they last longer) and grinding them as I need them (because they taste more fresh).  I *really* want to.  I like that you can just use a coffee grinder for your spices (although you never want to use the same grinder for both) and I *really* like that they are inexpensive (read: $20).

Do you grind your spices at home or buy them already ground?