Hmmm I lived in Lancs for a few years and I don't like Manchester
. I've never been to Liverpool.
London... Hmmm... Is a great place to visit but I could never live there. It is just too busy/polluted/overpopulated. However for things like restaurants/facilities/the west end, obviously it is a world-class city.
So yeah. London to visit for a few days, have a few meals and see a few shows.
Then back to the fresh air to breathe
.