I think the college and/or the course maybe critical to where you live. If it wasnt then pretty much the whole of Dorset is open to you!
Do you have a preference for the Jurassic coast (past Weymouth), or the other side? The Jurassic is quieter and property cheaper. Bridport is lovely, personally the villages nearer the coasts this side are too quiet out of season.
I prefer smaller towns (so not Bournemouth, Poole, Weymouth, or for other reasons, Swanage, Portland, Wareham)
I would choose a town and then look for a village nearby - youll be spoilt for choice.
Sherbourne and Shaftsbury (both maybe too far from the sea?)
Dorchester (great schools), Wimborne (maybe the area is too busy), Bridport (town not to pretty, but prob my favourite villages around here).
Very envious, its my childhood home but cant even think about retirement yet!