What gives you a "warm feeling" inside when playing?

Usually it's all kinds of stuff I notice while playing that makes me think aww man I love this and it's all over the place and hard to pin down. It's when I take them jogging and different neighborhoods or areas have different sounds and I'm like I didn't remember this. That they track and look at people or other things. How warm it feels in the sim house when I see the frost on the windows and the snow outside... it can be immersive. The shy wave of a toddler to the Flower Bunny. The crying in the shower when sad literally tugs at my heart strings. Just about every time I go into game and I'm right there with my sims playing on the slowest speed it's things like that that pull me in and make me grin.