I read mostly Yaoi and Shounen Ai, my favorites being Yakuza, Adult Life, or Supernatural stories.
I prefer more mature stories with deeper plots or lots of action. I also prefer the couples to be more manly, or atleast no girly ukes. (some exceptions if the manga is really good)
Some of my favorite BL mangaka: Natsume Isaku Naono Bohra Ichikawa Kei Nishida Higashi Kodaka Kazuma Enzou
I sometimes enjoy non-BL genres, especially stories with lots of bromance or strong female characters.
When I'm not reading manga, I'm usually searching for good BL fanfiction or trying a new anime.