cywscross's Bleach works are here.
Mixelation writes Ulquiorra/Orihime fics on occasion and those are always fluffy and cute. They can be found here
Onto some more specific ones:
freedom above all things by hellbeast is a fic series I have recommended before and I will continue to recommend it because 1. I cannot be controlled and 2. I love OC/SI fics that are heavy on worldbuilding and fuck with canon. Weird and fun.
I rediscovered Grimmjow's (*muffled sounds of my repressed cute aggression*) little toe beans recently, so the following includes a staggering amount of Grimmjow, even though if you asked me which pairings I liked best, they probably wouldn't be Grimmjow pairings. I contain multitudes and I'm weak to kitty claws.
Many of murderlight's short Bleach fics are good fun. I love
- On the Menu🍣, a light Grimmjow/Orihime fic
- Something Fishy 🐠 which is a fun and absurd Grimmjow/Ichigo fic about Ichigo's brief but dramatic mermaid transformation, and
- Landmines 💥 is a less comedic but pleasantly iddy short Grimmjow/Ichigo fic about getting a bit paralysed in the empty world.
Asuka Kureru has written several fun Grimmjow/Ichigo fics, including:
- Candy for Cannibals, which is basically a Bleach take on the old Canadian Shack trope
- Yield, a short Ichigo/Grimmjow fic that's noncon but in which Ichigo is really very sweet for a rapacious out-of-control cannibal monster, and
- Superhero Love Triangle, which is a superhero AU that blends the Bleach hollow worldbuilding with the expected superhero stuff.
voxofthevoid has written several really fun Grimmjow/Ichigo fics also:
- the hunter and the night (of some other story) is a dimensional/time travel ship fic with a powerful vasto lorde Ichigo, given from Grimmjow's baffled perspective,
- cannibalism, the modern religion, which is an alternative canon fic where Ichigo doesn't get involved with the shinigami but he still meets Grimmjow, and
-bury all your secrets in my skin , which is canon-universe oviposition tentacle porn and it's very very cute.
Individual fic recs:
Forever Never Sounded So Stupid by junko is a fun Ichigo/Aizen fic. I personally never especially liked Aizen as a character? But I liked this fic anyway, so if you are an Aizen fan you may particularly enjoy it.
Falsetto Tormental by balimaria is a very cool exploration of Ichigo getting stuck as a hollow and what that might be like, which I love.
Rōnin by glacis is a Bleach/Ouran Highschool Host Club crossover that's fast paced and fun.
Ulterior Motives by triste was my very favourite Ichigo/Ishida fic from LiveJournal Ago and I'm pleased to see it's on AO3 now.