Excellent movie - emanating from the mostly worthwhile Disney-Marvel superhero series!
I was delighted to discover that the main theme is the spiritual awakening of a modern, Western, materialistic man (the extreme of this typical type) to discover reality beyond the five senses. Which is almost the most important and relevant topic it possibly could have.
As well as its unusually deep core; the movie is very varied, with plenty of humour, some very appealing screen pictures, and impressive fight and action scenes - also a few touching episodes, one of which drew a tear.
The principals (Benedict Cumberbatch and Tilda Swinton) are both impressive - as these actors usually are.
In sum - go see it, if you like that kind of thing.
Note added - I saw Doctor Strange with my wife and three kids between 14 and 17; and we all thoroughly appreciated it. I should also clarify that this is not a Christian movie - obviously not (being a mainstream Hollywood production) - but at core it does the things most needful for spiritual awakening. Somehow, this message was smuggled-out... thanks to whoever did it.