This is a hard one! I was brought up in the beautiful Sussex Weald, just north of the South Downs but also spent lots of time in Brighton & Hove (on the south coast) as it's so close, I went to school there and had some family & lots of friends there.
I think overall I prefer the countryside but I like to be near water even though I don't like to swim. Coastal regions are beautiful and I love to be on the prom when the big waves crash over the railings when it's rough at high tide.
The countryside has beautiful grasses, trees, rolling hills, flowers and endless lanes and landscapes to marvel at, so.... yes, the countryside.