If you liked
Banana Fish
|
...then you might like
Ajin
|
Both have shoot-outs, evil scientists doing unethical experiments, prison scenes, attempted rape, appearances by the Chinese mafia, old men who are obsessed with teenage boys, and bromance. Banana Fish has BL subtext though.
If you liked
Ima, Soko ni Iru Boku
|
...then you might like
Mahou Shoujo-tai Arusu
|
Both involve the mc being transported to another world where the mc proceeds to annoy the other characters with their strong opinions.
If you liked
Fruits Basket
|
...then you might like
Sex Pistols
|
animal "inner spirits"--in Fruits Basket, it's supernatural and Sex Pistols has a very complicated genetic/evolutionary explanation but there is a similar feel. Also both have many canon couples and a large and strange family. Though, in my opinion Fruits Basket is much much better than Sex Pistols.
If you liked
Ouran Koukou Host Club
|
...then you might like
Seiyou Kottou Yougashiten: Antique
|
Both shows feature pretty boys who come together to form a family of sorts while serving cake to girls. Although Antique Bakery is definitely BL, Ouran is only slashable.
If you liked
Gravitation
|
...then you might like
Junjou Romantica
|
Both feature smoking writers who are distant from their families, characters who are afraid to love again, and assertive ukes. After seeing Gravitation, all other BL falls short, but Junjo Romantica is so cute, I think any Gravi fan would enjoy it.