Circle versus Jay is dependent on the rod you are using. A stiff, fast action rod (like a musky rod) is NOT a circle hook rod.
Beyond that, I use the 1/0 per 1" of bait rule....8" bait needs an 8/0 hook. Bigger than 8", I use a tandem hook rig. One in the nose/mouth/eyes and one near the tail.
I use circles and J hooks. Depends on the rod being used but the size of hook to size of bait is a rule I always use regardless of the type of hook. For Jay hooks, I use Gamakatsu octopus 5/0 to 8/0 or big river hooks 5/0 to 8/0. I also use Gama octopus circles 5/0 to 8/0.
For nightcrawlers and small chunks of cut bait....I use eagle claws usually in the 2/0 to 4/0 size range