I have seen similar headcanons where it's just that Aziraphale is a very, slow, eater, and Crowley finishes first and just lingers over the wine, which, mood. But making it so Aziraphale likes indulgent things and Crowley likes Aziraphale - like a lot of the fic is doing - is unbalancing things even more than the wings thing. Crowley is every bit the earthy sensualist in all the ways that his Angel is!