I moved to the coast (sussex) about 15 years ago when i had a toddler and was pregnant with my second. I love where i live and have no plans to move anyway but even though the beach is only 10 minutes walk away i must admit i never bother to go and the nearest i get to seeing the sea is when i drive down the coast road each day.
We upped and moved from a very well to do town in Hampshire to Bideford, North Devon, in 2002. I have never regretted a single minute. Seeing running water every day is like therapy for me. We have about 5 beautiful beaches within ten to twenty minutes drive, and I cross the estuary every day on my 8 minute commute to work
Moved from London to the Highlands 5 years ago. Love it, love it, love it. There are very few things I miss, and life for LOs is much better than it would have been down south. We have been poorer in money, but richer in lifestyle. Simple pleasures now eh? A big bag of salty chips in the car on the harbour on a stormy day, watching the waves and looking for dolphins.
For me, living next to the sea improves quality of life in so many ways.
When returning home from being inland, I can feel and smell the sea and it's like taking a lungful of oxygen. In summer, when it is stifling inland, sea breezes keep the air fresh. In winter, the sea warms the coast and there are fewer frosts.
I think one of the best things, though, is that the sea and sky look different every single day; colours, clouds, mists, sea state, bird life, marine traffic and so on - an ever-changing landscape.
Unless you're planning on moving next to the Port Talbot Steelworks, or Dungeness Nuclear Power Station, I'd say go for it!
We moved three years ago, live on a mountain, by the sea (in Greece). Things have been tough at times, but on the whole we are a lot happier than when we were in London Can afford a nicer house, have a great view to wake up to, cam go for a dip/hike/run/kayak outing anytime and... why not?