When I am looking for new anime series to try, I often use Anime News Network to pick by popularity or quality of votes. Because I haven't watched a whole lot of anime, it's useful to pick out series that I may not have heard of due to age, etc, but that I might enjoy. It is a similar concept with Rotten Tomatoes for movies.
I was wondering whether any similar websites exist for ranking comic runs by popularity/voting? Comparing, for example, Joss Whedon's run on Uncanny X-Men vs Batman's The Killing Joke vs Watchmen vs Sandman by user voting in some form.