Doctor Strange is one of the more visually interesting Marvel movies, with effects sequences reminiscent of a kaleidescope, Inception, and M.C. Escher. It’s not that great otherwise, so I’d put it at the lower end of the Marvel movies. It’s good, clearly better than the Edward Norton Hulk, but in the first Cap movie range probably.
Benedict Cumberbatch is fine as Strange, he’s better at playing the early asshole version than the later nice guy version, but he isn’t like Paul Rudd in Ant Man who could elevate mediocre material. Rachel McAdams probably deserved better than the crap nothing part she got. Tilda Swinton was fine but it’s still dumb to have a white person as the Ancient One. The rest of the cast was quite good.