6" blued Ruger GP100. Felt like a brick, terrible balance. Couldn't shoot it worth beans.
Was hoping for something like the Security Six I loved; but they'd changed the action so the trigger didn't feel anything like the Six and I could never pick up the rapid fire rhythm that came naturally with the Six.
Kept telling myself what a wonderfully engineered and overbuilt revolver it was and how I should be overjoyed at owning it. Finally, one day, the scales fell away and I traded the turd.