I totally agree about the smells of dinner cooking and how it connects you to (or at least makes you wonder a little bit about) the people whose homes you are passing. Sometimes it is murder when I riding hungry, but I love it nonetheless.
Another small bike joy for me is playing leapfrog on Mountain Ave with cars. A car will pass mid-block, which I will then catch up to at the next stop sign or light, and then the car will pass again, and again I will catch up at the next light or stop sign. This mostly happens right after Salpointe lets out or during other heavy commute times. I'm not sure the drivers even notice, but it is a fun little game I play with myself that makes my commute stretch up Mountain go by quickly.
I think my greatest bike joy is the rarest, which is maybe why I like it so much: the complete stillness in motion when you are riding with the wind and at the exact speed of the wind. Like I said it is rare. But I just love cruising along at 15mph or so and suddenly it seems like the world is zooming along beside me. No wind noise in my ears, and hot (or frigid) air pressing against my face. It seems easier to pedal, and oh so peaceful.