I really didn't enjoy the game with the biters turned on, but absolutely loved it when I switched to peaceful mode. There are enough problems to sort out without them, like "why do I suddenly not have enough iron plates", or "why do I suddenly not have enough copper plates", or my personal favourite, "why do I suddenly not have enough iron plates again"!
"Why did I install the Angles and Bob's mods", "How do I build a waste processing loop so my entire base doesn't lock up", "Why did my wife and kids leave me"