I was noticing Horvat's +/- the other day. He's never been a plus player. I know it only tells one story, but for a guy who supposedly plays a 200 foot game, that's a bit of a concern.
Then you look at a guy like Chris Tanev, who played on some pretty horrible Canucks teams through the years, and even on a bad Calgary team this year, in his 11 NHL seasons, he's had one minus year.