Hi There,
stay away from Blackpool for sure, it's party central, full of stag and hen nights, used to be a very nice place but not anymore, it's very run down and dirty. Nice areas I would say are parts of Cheshire, it's clean (no litter) you'll find lots of litter here, very littlle crime, good schools and very well kept. I live in the Manchester area and wouldn't recommend it, it's no place to raise kids, lots of serious crime and again dirty.
Good Luck,