What made it grow on you? At a certain point I just couldn't take it seriously anymore as it kept leaping from one major story beat to another seemingly without regard for the resulting tone changes. Some of the dialogue is like the movie is unwittingly writing its own porn parody. ("Drink from Lancelot's cup, and partake of his goodness!") I didn't even enjoy Nicol Williamson which probably means that all hope is lost on me. The only things that felt like they aged well were the raw scenery and the casual treatment of sex and violence. I think the latter when combined with the fantasy elements and archetypal characters points at the difficulty in properly adapting Arthur's story; I've never read the actual books like Le Morte d'Arthur or The Once and Future King, but based on everything I've caught over the years and could piece together (correct me if I'm wrong) I feel like you'd need to find a perfect middle ground between the grandiose mythmaking of LOTR and the complex character work and relationships of ASOIAF/Game of Thrones, and good luck pulling that off.