As with all things, there are a small handful of genuinely brilliant pieces of art, and a ton of derivative crap.

The good ones are some of the best media I have ever consumed and have left me with feelings that last far past the credits roll.

Like 90% of them though I watch one episode and then quit or else never start watching it because you can just tell it's ass by looking at the preview. In that way I don't really see it as that much different than 'proper' movies. Some of them are really good! A lot of them aren't. Some people like to go through the pile and find the ones that are good to share with the rest of us. Some people just really like watching the shitty ones, too.