My only complaints:
- I felt like they could have went kookier and added more mind-fukkery than they did. They didn't get too much into the multiverses and alternate realities and kept details about everything vague which is smart, but seeing as how that kind of stuff is integral to the comics and maybe later on in the movies, and how it would have took this movie to another level, they could have delved more into it. Sometimes it's just a bunch of cool shyt moving around and LSD-type illusions happening without rhyme or reason. There also wasn't much explanation given to the mystical powers and whatnot, Strange can just all of a sudden do the craziness with his hands and we don't understand the forces/reasoning behind the powers
- Villains were just ok. I don't think he ranks at the bottom of the bottom, but keep in mind he's a very minor villain and the stars/focus of the show is Strange and his allies
- Too much comedy sometimes held down the weight of the movie, but not in a totally deleterious way like Iron Man 3 or Age of Ultron. They managed to maintain some emotional density to the movie while keeping it lighthearted (Ant-Man and GOTG did this well too). But it's just another byproduct of that Marvel formula, where certain things like plot points and character and story motivations seem really inconsequential due to all the comedy
- Movie could have been a little longer
- I don't feel like complaining about the story because understanding Marvel's formula, you know every movie is more about the characters and the big scenes rather than any sophisticated story (barring movies like Winter Soldier or Civil War which were built up over several movies and/or were huge events). The story obviously could have been better, but to be honest I don't go into the theater watching Doctor Strange expecting or wanting much but Doctor Strange and seeing his powers and watching him fight and do his thing. DC tried to give a detailed and elaborate storyline in BvS but audiences didn't care for it
Everything else was fire. I really enjoyed the performances, I think the dialogue was a little corny sometimes but it was generally well-written, the visuals were top notch, there were a lot of really great and memorable scenes (Just a couple from the top of my head: Surgery scenes, Ancient One falling through the glass, Ancient One's final moments with Strange, time moving backwards or standing still scenes, mirror dimension in NY scene) and the action was great. The jokes in this is typical Marvel-type humor, which depending on your preferences you might like or dislike, but I thought it was funny throughout. I give it a A-/B+
I don't know if I'd put this with the tier 1 movies (WS, CW, GOTG, IM1, A1) off 1st watch but it's very close