Here is an ear I made for one of my characters. I know that when I started, ears were very hard to make. This has a 14 vertices span for attaching to the head and has a little over 3000 faces with a subsurf of 2.
Thanks. I know it probably is not really in a category, but I thought others might benefit.
ps someone wanted to know why it is blue in edit mode. The show weights button in display panel is turned on. Turn it off if you don't like it. I use it to not only show weight painting, but it really shows up the topology nicely.
Normally I would reject a blend like this immediately because it's just a floating body part, but this ear all by itself is so well made that not publishing it would be criminal! Great job, I've struggled with making decent ears myself; this blend has taught me a lot!