for me I think it would be any of the planned towns, something about them just depresses me.
particularly Milton Keynes, it seems so out of keeping with.... well anywhere else in England..it seems so modern (in a bad way, in my opinion) and therefore kind of soulless and devoid of culture, and for me no amount of chain stores and american restaurant chains can compensate for that. But I guess a lot of it just depends on what you want from a place, for soem people the presence of a TGI Fridays and a stupendously sized shopping mall might be all they ask of a place to live!
*waits for someone from milton keynes to come and give me neg rep lol*