There are a couple of major fanbases with the NHL: those that like Sidney Crosby and hate Alexander Ovechkin, those that hate Crosby and like Ovechkin, and those (myself included) that just can't stand either of them.
The first two go back and forth describing how Crosby is the second coming of Wayne Gretzky and Ovechkin is just a goon, while the second says Ovechkin is "just a badass!" and Crosby is a baby.
Personally, I can't stand Ovechkin because of the dirty play that a lot of people sweep under the rug because he can score so well. Here are some videos highlighting the dirtiness of his game and why he really should just leave.
Now, I understand that occasionally a player makes a bad/dirty hit; it happens. But the regularity and lack of concern for other players' safety is what really sets Ovechkin apart in this regard, and not in a good way.