Can't think of anyone I hate. Bonds is a total asshole, but he and I will never cross paths, so I'm glad I can appreciate what he was able to do when on the field
There are some players who I'm sure are swell guys, but they end up with so many people with such a huge crush that it gets hard to separate the player from their annoying fans. One I even think is truly awesome, but sometimes fits that category is Ichiro