Based on a series of novels, the anime Kyou Kara Maou is a show that I think I would've liked if I had the chance to see it. While it's not a BL show, it has some hints here and there as well as a ton of attractive guys. The show was released in the U.S. by Geneon Entertainment but due to the company's exit from the market, its release was incomplete. I sincerely hope that it gets resurrected by another company one day.
Most of the artwork in this post comes from the excellent site Portrait of A Demon King, which is quite literally a one-stop shop for Kyou Kara Maou scans.
