i believe "interesting plot" is dependent in an individual's personal taste.
however, i am compiling cute and bratty semes i like in this list you can just go around and shop.
http://www.mangago.me/home/mangalist/43695/
The Canis Series got a pretty nice plot. It got 3 parts. Part 1-2 is about a Hatter and an ex mafia member on a mission to die. Part 3 (the best part) is difficult to explain without spoilers but it follows three orphans and their stride for justice, even if that means getting involved with illegal things. The art is also really swell and the romance is really well done and you can understand why and how these characters fell in love
BL with an interesting plot? Preferably ones where the mcs don't have pre-established relationships.
-Bonus if the seme is a big brat who eventually falls in love with the uke (I recently read BJ Alex).