Feedly has an easy to overview interface. While this interface is clean and simple, it is still full of bright colors. A great feature that adds to the clean feel is "eliminate clutter", which keeps only the text of the desired topic.
Feedly was the first to offer a seamless and easy Google Reader migration, and that's what won me over immediately. I've only been using the free version, but I don't really miss any features, it works really well for the casual reader.