Right now I'm categorizing all series on the site based on:
Watched = Watched, Rated and have Written a Review For.
Watching = I Own the series, But have yet to Watch it.
Want to Watch = Want to watch based on recomendations, reviews or minor viewing.
Stalled = Series and subsequent add on OVAs and Movies that I'd like to watch, but at over 50 episodes would be a little too time consuming for me right now.
Won't Watch = Based on the premise and reviews from trusted reviewers I'm not interested in these series.
Dropped and "1 Episode Watched" = I may be interested in watching the show, but it's currently unavailable in English.