Soleron on 27 March 2013
Neither.
Good art is functional, not creative. It serves the gameplay and world. If you're noticing it when it's not usefully trying to get your attention, it's probably bad. Ideas are cheap and can be made on the spot; execution take time and talent. The creativity myth is the #1 problem with the industry today.
Realism is restrictive on the kind of world the player experiences, not on developer creativity.
I think Mario Sunshine is the best a game ever need look to illustrate the mechanics and ideas of a game world.
