I've had Master Cook for a while, probably ten years or so <img src="http://www.traveltalkonline.com/forums/images/graemlins/Yikes.gif" alt="" />. I do like it, because you can search recipes for ingredients if you're trying to decide what to cook with what you have on hand. Importing recipes is pretty easy too, and there's a site where someone has converted tens of thousands of recipes to Master Cook format that you can download free.

That said, I find I'm using Pinterest more and more. One problem I have found with Pinterest, though, is that blogs can go away, and links no longer work, so saving the recipes to a cookbook program does have its advantages.