None of your samples is DDD. Each one is simple CRUD.
- Don't "set fields". Do meaningful operations.
customer.MoveTo(new Address(...))
customer.FixAddressTypo(new Address(...))
Repositories are for aggregates, not any entities. Identify your aggregates. http://dddcommunity.org/library/vernon_2011/
Why not map the Addres value Object as a bunch of fields in the Cutomers table? You don't need separate table just because you have a separate class.
Value objects should be immutable.