Our favorite trip is up the California Coast to Mendecino, Monterey, Carmel and Napa/Sonoma. Next spring, we're doing that and heading up to the Canadian border so we will see Oregon and Washington State - Maybe Idaho too. We haven't mapped it yet.
And we have a long weekend in mind for Washington DC - we just have to work it in.
We really like the Tauck Tours we've done - their Fall in New England and last year, their Classic Italy. Thinking to put a France intensive trip on the books with them.
Hawaii is a great between cruises place for us. We do continuing ed classes in Las Vegas every year or two.
My list is LONG and my time and money are finite (sigh). My bags are always ready to be packed.