I'll echo the Shawn and Angle sentiments for the obvious reasons. Still enjoy them quite a bit, but it's a more reserved and complicated enjoyment.
Mine is probably Kenny Omega. While I wouldn't ever say I formed a deep emotional connection with his work, he used to be one of my favorite guys to watch in the world about six to eight years ago. Suffered from the same problems a lot of indie guys these days suffer from, but he was fun and goofy without annoying me, had a fairly unique way of moving around the ring, and always entertained. Even with his jump to DDT he managed to keep me interested. However, since joining NJPW, his style and character have changed in just the wrong ways to make me totally 180. He's become just another overly dance-y, finisher-crazy, somewhat nonsensical NJPW main eventer. Even his character's changed, becoming just another too cool for school Bullet Club guy. I'd never call him a "great" wrestler, but anything I once found enjoyable in him has been driven out of late.