Like Jeff said, it depends on what you want to do and how well you it right with the shot.
I personally don't like to do a lot of editing. I always try to get it right when I take the picture. Easier said than done.
I've used aperture, lightroom, photoshop elements and Capture NX2. In the end I always go back to Capture NX2. Its Nikon's own software and it does what I want, crop when I need, adjust exposure compensation when I need, red eye if needed, adjust white balance, and a few other things.
I will use Elements occasionally for some "fun" editing stuff, but thats not to often.
I shoot RAW and personally, I don't want to deal with getting all the plug-ins and bla bla bla with 3rd party editors. I do have some specific settings in camera and unless I get the right plug-in the 3rd party editor don't recognize what I've done in camera. I'm sure its fairly easy for most people to get the plug-in's, but I just don't want to deal with it. So I stick with Capture NX2. For me its less hassle. Plus I don't want to spend all kinds of time doing post processing. I like my computer, but not that much.