Walking: I get to observe my surroundings more and have access to nature paths in my community.
Riding transit: reduces carbon emitted/ doesn't add more than would be emitted anyway due to doing transit in mass, and get to see places I wouldn't be able to otherwise on foot.
Biking: I get farther than I would walking, and I genuinely love the rush of speed and wind pushing against my face.
Driving: For me driving is stressful, but riding in a car someone else is driving is calming to me.