I like WASD better because I'm a downright ganer and it's usually the left hand who's in charge of controls. Although it is the thumb that's used on a console controller I guess I'm used to controlling with the left and mashing buttons with the right ^^.
WASD!!!! My hands are more fit fore that kind of position, especially if the game only makes you use the WASD in the keyboard, since, I prefer my right hand on the mouse(even if I'm not using it!)
Arrow keys for me, Always used laptops and 'mouse' is in the middle, and I'm left handed so I use mouse with left hand, so it has to be arrow keys, would prefer WASD but you get used to it.
I cant play most games because I play on a laptop...I prefer WSAD because Im a lefty, but games today require all kinds of buttons with mouse involved. Yes, Im too lazy to buy a mouse.
There shouldn't be a standard at all, because some games (Thing Thing series) are easier to maneuver the basic controls using the W-A-S-D format. I perfer using the W-A-S-D format because i'm left handed, therefore my opinion is biased. 'Nuff said...