>>18001Several of these have a second or third season already,so the time investment may be greater than expected.
The most important for 4chan are
* Boku no Pico (obviously, but it's boy porn, you don't need to watch it)
* Fate Stay Night (that's the bad Deen series - there is also an Unlimited Blades Works movie and and the retelling of the UBW story in the recent UBW series and a lot of other series and games)
* Love Live! (one of the most successful anime of the last years, with a second season and a movie).
* perhaps GTO but I didn't watch it