For color, I like the look of Vision3 250D, Cinestill 400D, Gold, and Lomo 400. It’s hard to pick one since there’s so many to try! For B&W, I really enjoy TMax 400 though.
I’ve only been able to shoot 1 roll of 250D and 1 roll of Cinestill 400D (I think people say it’s the same minus the remjet) but I really enjoyed the results. It’s pretty cheap to find but finding a place to develop it is more difficult and expensive than C41.
I’ve not tried 400D as normally dev at home so just go for the cheaper pre rolled vision 3.
But will have to try it one day as removing them remjet is a bit of a pain.