I love the area around Brighton and often visit off Season, but it does get the London Crowds as soon as the Sun comes out: A23 down to Brighton, A24 down to Worthing.
I seem to be slowly migrating west – Grew up in North-Berkshire-that-became-South-Oxfordshire, but then got hitched and moved to Kent, now in Hampshire, hoping for Dorset once DH retires/gets laid off (whichever comes first). ‘Near the sea but not by the sea’ is the plan.