Feedly is the site I've been gravitating toward. I think it has the most similar features to Google Reader and is trying hardest to accommodate those consumers. It is a very customizable system, but I do think it focuses a bit more on flashy rather than utilitarian design, which takes some getting used to. There is also the annoyance that you can't add multiple tags, but hopefully they will eventually address that.
The Old Reader attempts to more directly mimic Google Reader's style. My peeve with it is that it doesn't connect directly with the old Google Reader, so as I imported a couple months ago, I have to redo the process to keep my feeds up to date. For those of you exploring many options, this might be a frustrating experience, since this reader isn't keeping track of any activity not done on its own servers.
The other reader that many bloggers are recommending is Bloglovin'. I personally find Bloglovin' to be a little too utilitarian, but I think it's a good option for readers who don't like to jump around their feeds as much, as well as those with a smaller number of sites that they follow.
That's it! Please follow me, and we'll keep the posts coming! Thanks!