A few things about walking....
- we almost always have the toes pointed out when we stand or walk. The straight-forward-feet looks very Frankenstein-ish. (I noticed Daniel Day Lewis was dong something like that for "Lincoln" )
- our feet tend to land much closer to a center line than we imagine. On men the heels will just barely be missing each other as they pass and sexy women will do a catwalk where the feet may even be crossing in front of each other.
There are some very wide, stiff people who have to lurch from side to side to crane their legs around but it's a very awkward look.
- the slower the walk, the longer both feet are touching the ground. The rear foot will still be pushing off with the toe on the ground after the front foot has landed on the heel.