You pull out a weed, find a girthy carrot and before you know it, dinner plans have changed.
It's cool that computers just don't open your programs when you don't ask them to. Like being woken in the middle of the night (hypothetically speaking since most gamers sleep during the day) to the sounds of Flight Simulator 2002 (I live next to an airport) or random humping noises (I have terrible spam). It's also cool that the orcs in Orcs Must Die 2 don't start rushing at you until your locked, loaded and ready to shoot green sperm everywhere. I guess having time to strategize is a neccessary standard for any tower defense type game. Then you can slaughter a wave of hords then unlock some better weapons then mow down another wave of hords then unlock some more gear then eliminate another wave of tools then unlock some better hores.
Pretty relaxing actually, like popping bubble rap. The better you construct your defense the less your character needs to do after the hord is released. I figure if you're clever enough you could theoretically just sit back and enjoy hundreds of orcs perish trying to get passed your blatantly obvious arrangement of death traps.
Only if bringing girls back to your apartment were this easy...