Quote Originally Posted by ZenbaaS View Post
Which brings me to an important question. Why do so few animes have truly "happy" endings...?
Many times anime is simply made to promote the manga from which it is made. That's why some of them have a cliff hanger ending - Deadman Wonderland comes to mind. Then again as you said many romantic comedies have happy endings because it fits with the style of the show.

Personally I like the endings that leave you thinking, although a happy ending is nice sometimes too.