i would have to say Marin is probably the nicest not cuz thats where i live. You have all of West Marin Bolinas, Stinson, Point Reyes, Nicasio, Olema, The SG Valley (which is where I live) which are all beautiful you have so many beaches and national forest, tons of out doors shit to do if thats what your looking for. Marin also has some small down falls such as towns like Ross, Larkspur, Greenbrae & others which are full of super rich yuppies which can get annoying. If you take out all the yuppies pretty much all of Marin is Gourgeous except for like San Rafael and Novato.