I would suggest the Isle of Wight but find out more about the Island first. Some parts that are out in the sticks could be a nightmare for public transport and shops but there are other places like West Cowes, Sandown, Shanklin, Rookley or Newport which is more central for buses etc. It depends, if you are happy and content not to leave the island too often then it will suit you fine. The cost of the ferry with a car can be pretty expensive as is the High-Speed Hydrofoil which deters a lot of people from making trips to the mainland too often. The views are lovely and it is a very laidback place just what you need when retiring. Each town has it's own carnival and some of the Agriculture shows are worth going to with local produce. The Garlic festival is great for trying the unusual like garlic ice-cream.