Well might as well add the “babka surveys” from SE - the original and the updated.
Perhaps it’s blasphemy, but my favorite babka is still the one at Trader Joe’s - rich, buttery, moist, and super-chocolatey.
I was glad that it made an appearance on the updated SE survey (and I suspect it’s made by Oneg).
I’m with Elaine on chocolate over cinnamon…
(As an aside - Breads is a Nutella babka, not pure chocolate, plus also separate baggage re palm oil).