I mainly walk everywhere I go, but try to fit in rollerblading and cycling whenever I can. None of them for exercise, just the fun and variety of the 'feel' of the 3 modes of motion. Cycling obviously covers the greatest distance, walking is the easiest, and rollerblading (to me) is the most fun and 'free' feeling for me, but it's the hardest to master if using it as an actual form of transportation (but doable if you're skilled enough and fearless enough to brave a busy urban area). Walking is my default mode, and when sightseeing, I usually opt to walk because it's low maintenance (no need to worry about locking up bike or switching rollerblades off my feet when going indoors).
Great post.
Where I live, it is quite possible to use walking/bicycling as my sole form of transportation. I have defaulted to mostly walking for the very reasons you stated. As a matter of fact, in 2016 I've been out only 5 times on the bike - but have walked walked walked like a madman.
The health benefits of a walking program are amazing. I'm maintaining a normal weight (according to bmi), my BP averages 100 over 67 (at the beginning of the year it was around 115 over 75), Resting HR @ around 42, etc. Basically I'm proving to myself that the health benefits generated by bicycling are also attainable with an aggressive walking program. At 63 yoa I am free of prescription drugs, have no chronic disease, and owe it to bicycling as a younger person and walking now.