I really got into writing "Haiku Triplet" poems last year.
I'd decide on a topic, give each poem a title of its own, yet the overarching title would be the true purpose, what unifies them, a sort of story.
I don't know if anyone else has done that, but it felt really fun and original for me.
There's another one that I posted here, if you search through my poems, it's called "Turmoil..." and it is by far my favorite of my triplets.