It was the new film's fault. When I first watched Star Trek in 1996, I didn't like TOS. I saw the new film last summer on DVD (2010) and thought I should actually watch TOS. So I bought the boxsets and by halfway through the first season that was it. McCoy just makes me laugh and he makes me giggle. Plus DeForest Kelley was amazing and he had the most gorgeous eyes.
Ah, I see. I thought Kelley was handsome but it really was McCoy's humor that got me all starry-eyed. I'm so grateful that DeForest Kelley got that role...he and McCoy are a perfect match!