I’ve been using D76 for a while, what’s next?

I’ve been curious about other developers.
I’ve used the FPP d76 clone for a year and a half. I don’t have any complaints but I know people have strong opinions about these things.

I‘ve only used it in stock solution and I dump it after 6 months or so.
I don’t shoot so much that I’m using it up before it’s potentially toast.

I almost exclusively shoot hp5, but sometimes acros. I sometimes push hp5 to 800 and I’ve liked the look.
I don’t usually get the fine grain stuff, and I sometimes I want to try out a very low iso film.
I recently got a bag of expired HP5 120 film that I’ve been playing with. But it’s not really my focus to used expired film.

So, what should I try next?