I always use an eclectic mix of bones as I keep the bones from marrow I eat, other foods I cook, and then buy end joints, tails, or feet to add according to need when I have a collection to make a pot with.
Mine is never light on the gelatin! Sets up like a brick.
I definitely have a preference for cloudy fatty stock over clear broth any day though.
Individual tastes and all.
“You have your way. I have my way. As for the right way, the correct way, and the only way, it does not exist.”
And that's why I'm here eating HFLC Primal/Paleo.