Just finished Black Butler, Legend of the Legendary Heroes, and Sword Art Online.
I really liked Sword Art Online. I did find the ALO section a bit tedious, but I don't think it made me like it any less. Plus, I was impressed at how many clichés and tropes they actually managed to avoid. Highly recommended.
Legend of the Legendary Heroes was a little strange, but had some nice charm to it. Unfortunately, only one season was made and so the show ends with the reveal of the big bad.
Black Butler is some dark dark shit. Hilarious in many ways and there's a ton of joking constantly, but damn. And the ending, damn. Not sure I actually liked it or not. Not sure if I can recommend it at all.