I don't either, but why are there role players who walk and don't run? how does that work anyway?
Like: i'm on 360... so than i push the control stick just a little bit?!? I'm not that anol... sounds silly to me.
Some rads, not all.
I did it on one playthrough because I was curious to see:
1) How scarce water and food became if travel took longer.
2) How important the character felt on a dead-is-dead playthrough if every step taken actually took a decent amount of time, meaning their death would be HORRIBLE.
Water and food and sleep actually did end up being harder to come by, for a while. I remember getting dehydrated to the third level once and doing a dungeon with sleep deprivation, which I'd never done before. The character DID actually feel more fulfilling and realistic too. I wasn't winning 3 different battles in a single day's time.
Honestly though, I doubt I could do it on another playthrough. Once was enough.
Besides, the Courier is a....well he's a friggin' Courier. He of all RP rolls would be used to running everywhere: it's his job.