There are a million shades of white (literally), but let's keep it simple: white is awesome. I've had white walls nearly all of my life, except in high school when my mom let me paint my walls blue.
(Trust me, plain white would have been infinitely better than the blue I chose.)
I like white walls because they are serene, which is a quality of chief importance in my book.
I also like white walls because they help colors pop-- I don't think you could say these rooms are boring!
White walls are also an excellent background for textures--they're simple and let the textures do the talking. I love this quality especially.
White? Me gusta.