For me, Twilight Princess hands down. Not only is it my favorite game EVER, but the style of the game is just amazing.
I agree. The styles fit they're own game. The style of TP fit the more serious plot, and the style for WW fit its more cartoonish style.I love all the graphics and I think they fit their games well.
Wind Waker just has such a childish, cartoonish and fun feel to it, so it makes the game even more adorable and fits it well.
The more realistic style of Twilight Princess fits well the intensity and seriousness of the game. They also used the graphics quite well to make Link really cute, heehee.
I wouldn't say that I like one more than the other, because they both are great, and fit the themes of their games very well.