Haha Pal you are obssessed ;)

I commute on the DLR every day and it is quite pleasant outside of peak times.>

Well yes by all things on rails but I like to highlight places and things off the usual tourist path and to take that elevated train thru the splendid Canary Wharf area is such a thrill - to a tourist but yeh not to someone who rides it every day - but thank God you are above ground and not below.