Now for HORRIBLE DOCTORS...that CLOWN in the multi-part suit, Colin Baker. Dear God...bad regeneration or not, he was the REAL Anti-Doctor...at times mad, vain, silly, unfaithful, downright CRAZY. I hated that character!!!!
McCoy was a great choice for the Doctor, but he was unlucky to take over when the show was in a tailspin. Senior members of the BBC wanted it off the air and stripped it of staff and budget. He had a good Dalek episode though.
Colin Baker gets a bad rap... It wasn’t so much him, as it was the internals at the BBC and the desire to kill it off.
Try some of the Big Finish audio plays for the 6th Doctor for a better view of what could have been. He had potential. Same for McCoy, really...