Nothing makes me so overjoy than knowing that my favorite manga is going to have an anime/life-action adaption. It doesn't matter if I've already re-read it like 20x, I can still sit and watch it without skipping anything. It's just something about seeing and hearing your favorite characters come alive on screen is so magical. I honestly won't mind fillers at all (unless it's an action type like Bleach or Naruto) because fillers are something new and I appreciate a few side stories if it mean more screen time for my favorite characters. Surprisingly, many of my favorite manga are already made into anime. For example:
Akatsuki no Yona
Nanatsu no Taizai
Shigatsu wa Kimi no Uso
Terra Formars
Tokyo Ghoul
Ansatsu Kyoushitsu
Skip Beat!
There are only a few manga left that I'm still waiting for anime adaption.
1. Oresama Teacher -- This is hilarious! It's from the creator of Gekkan Shoujo Nozaki-Kun. I love the mangaka's sense of humor. It's kind of idiotic but funny regardless. All the characters are wacky and adorable. Not sure if I would consider this a reverse-harem, though there is 1 girl surrounded by many hotshots