Favorite Cinematography?

In black and white I would have to say either Gregg Toland, who was responsible for the cinematography in Citizen Cane (with Orson Welles they took cinema, as a whole, to a new level with that movie in terms of storytelling, camera work, lighting etc) or Karl Freund who worked in a lot of movies with F.W. Murnau taking credit for the expressionism movement in cinema (in particular in Germany, in the early 20th century), also the director of photography in Lang's masterpiece Metropolis and later in America with movies like Dracula (1931) and Key Largo.
Fun fact, they worked together in a movie called Mad Love, Freund as the director and Toland as one of the two cinematographers, the movie is starring Peter Lorre (famous from his early roles in Germany, most notably M) and is a loose remake of Orlack's Hands, a great example of German expessionism.

In colour I will agree with you but I also love the work of Roger Deakins. I should also mention that among my favourites are Peter Zeitlinger for his work with Werner Herzog in his latest movies and documentaries and Vittorio Storaro for his cinematography in the films of Bernardo Bertolucci (The Conformist, 1900, Last Tango in Paris), in Apocalypse Now and The Last Emperor.

(I hope you will excuse any spelling and syntax errors, my english are a little rusty as it turns out.)

Jack Cardiff's 3-strip technicolor work.

Lubezki. Good choice. Children Of Men and Birdman are expertly shot. I also like his work with Malick. The guy really knows how to pull off a long take.

For black and white, Sven Nykvist. His work with Bergman, in particular the use of shadows, was phenomenal.

For color, Christopher Doyle, in particular his work on In The Mood For Love. Lots of interesting angles, and good use of bokeh.

I also like Benoît Debie use of various light sources for the Gaspar Noe films he's worked on.

The Tree of Life.

All of Lubezki's cinematography is stunning.

I'd have to go with Sergey Urusevskiy, the cinematography he has done is simply mindblowing.
Another really good one is Yoshio Miyajima.

I think the question is actually "favorite cinematographer".
At least that is what the responses have been.

My favorite cinematographer is Vittorio Storaro.
"The Conformist"
"Last Tango in Paris"
"1900"
"Apocalypse Now"
"Reds"
"The Last Emperor"
"Dick Tracy"

Favorite cinematography is a much different question, since the question itself is not complete. Do you mean the best cinematography in a certain film? Do you mean a school of cinematography?

Older: Toland, Cardiff, Alekan, Coutard.

Newer: Lubtchansky (amazing work for Rivette), Storaro.

Spring Breakers
Knight of Cups
Victoria

There's something wrong with Esther.