Well I agree with Corvus that they can't really be separated into four strict categories, but there are definitely authors stronger in some and weaker in the other categories listed.
I cannot read JRR Tolkein, I don't like his style and his worlds are just too "built" for me, where as the characters are good yes, but not really my overall taste. For one there were only like three well known women in the plot? The Witch, the Elf, and the human woman warrior... hmm? (going by the movies so don't murder me)
Anyway, I am definitely a character writer, I do like plots, so that will be the second ranking one, but I'm not a master at it by any stretch of the imagination. I write for the realness of the place and characters and stories that can and do happen in real life - so I'm weakest in World building, I just don't want to do that sort of writing really, its difficult to build a world in 1st person perspective compared to third when the narrator can explain the world w/out depending on what the character sees, feels, and etc. I also have a mediocre style.. lol, although its pretty plain I struggle with that at times. I have a lot to work on when it comes to writing, but if it wasn't for my characterization skills I'd probably be a pretty sorry author to read.
And yes, I realize I am my own worst critic.