The best OPs that I have seen.
Using the list feature to help make a Top 100 Anime list. Right now it's very Work in Progress.
A list of the shows that I've seen that are over at least 30 episodes.
A list of my favorite mecha anime, including some obscure classics that seem to have fallen betweem the cracks.
A list of anime I watched a long time ago, when I was a kid / teen.
Unfortunately, I don't remember how many episodes I watched, so I should probably take the time to rewatch all of them...