Well, the reason I do it is because I already have a base in Didcot which I would otherwise have to try and rent out again - the monthly travel card isn't too bad, £500 or so and includes Z1-6 tubes as well. We lived in zone 5 for a while and that was £200 a month, and a lot more unpleasant, and a lot more costly than £300 a month more to live there. So very happy to base myself further out.
Is that what you meant by the "Why don't you just commute straight to PAD" question? Because I do - the only day I don't is when I am coming from DHM, after the weekend.
Cheers
Chris
Ok I see. If you already have a place in Didcot it makes sense to use that rather then rent somewhere in London and not have any commute Monday evening to Friday morning.