Takeshita dori, Omote sando... been there only twice, and I wish I could return for a purely photographic trip. The countryside too, with one big difference as you noted: on the countryside, you must fetch your pic; in those part of Tokyo one may sit and wait for pics to happen. But, beside the "picturesque" character of the place, it is the attitude of Japanese people towards photography and their general tolerance towards those weird foreign photographers that I miss most. I do not know how people feel about that, but if negative, you won't suffer from direct consequences.
I aprticularly like the one with the runners (because it looks more lively), and I appreciate the tactile footpaths, demonstrating that we are in a civilized part of the world. In my home town, sidewalks are meant to trap blind people, not to mention the even more numerous people with fragile ankles, given their poor design and absence of maintenance.