It will be much better at the coast or in the countryside. Cities are fine if you need the amenities, the work or enjoy the nightlife. Other than that, it's hassle being on top of people. I live on the edge of my city so within 10-15 minutes I could hit the countryside on a bicycle.
When I go on holiday I really notice the change in pace. I've stays in a few holiday cottages in the countryside and always look for the quiet areas. Cornwall is nice as it's so easy to get from one coast to the other. With the excellent A roads it's like getting to the other side of Manchester for me from where I live.
Not all the coast is the same though, I wouldn't advise Blackpool (no offence to anyone on here who does live there) as some of the areas are not good. The same with a fair amount of more northerly seaside towns. It was certainly a big difference seeing Lyme Regis in Cornwall by comparison.