I love the fate series as much as the next guy, but I still think it’s worth suggesting trying something from Gate. I bet you could draw a really good Rory Mercury or Yao. Just a suggestion, but the characters of that anime look like a lot of fun to draw.
Overlord! Though as long as it is genuine fanart and not anything explicitly NSFW, like the first one you did. It is my personal fault, but with some anime that I genuinely like, I do not like seeing NSFW of the characters... I am weird. Though if it were Overlord again, perhaps something with Sebas. My favorite character by far, he is a badass in this season/volumes!