My parents are beyond yellow dog Republicans. Not only would they vote for the yellow dog if he were the Rep nominee, they seek out information on nonpartisan races and only vote for Republicans for school board, etc., too.
I'm registered "unaffiliated" for practical reasons (live in a Republican county), but almost always vote for Democrats for statewide offices, congress and president. Locally, I vote for mostly Republicans b/c they're usually the better candidates.