Actually you HAVE to start up in Metro mode (tile mode) and shut off in Metro. It's quite annoying.
The only difference is that it basically starts up faster by around 20~ seconds more and also uses a bit less resources (CPU/RAM)
Haha, my brother has made peace with me so this post is now irrelevant. This was before he got into college and had all of this stress and decided to vent it out on me. Now he's in NYC living the good old college life.