This is likely the reason you love coming into the office. The fresh air, greenery in the park, and the walk that gets your blood flowing ... emotionally you _should_ be in a better place. Compare this with someone who commutes 30 minutes in traffic, and they will arrive at the office in a worse emotional state.
It took me a long time to realize that in addition to the team culture, my happiness/satisfaction at work depends a lot on my commute and the ambiance at the office (quiet and comfortable is good; noisy and cramped are bad).