I'm a fan of SHOUNEN AI MANGAS so basically i recomend bl mangas that are more story/content focused rather than just yaoi mangas that focus on the sex scenes urgh that the author and editor forgot the content of the manga. But still I have some favorites that have those scenes its just the mangaka was able to balance it out.
Anyway, if your just starting to read yaoi/shounen ai mangas, my recomendations are chef's kiss.
