If you're good at what you do I can appreciate what you're good at despite your other apparent flaws. Sean Penn seems like a real dip$hit but I've seen a few movies where his acting was great so I can over look the fact that he's a goof in real life.

On the flip side though occasionally someone will do something or get known for something that's unforgivable meaning that it overshadows everything they try to do later and it is impossible for me to enjoy watching them because it isn't worth the effort of trying to get over my inner disgust with them in general. This is rare but is has happened.

Basically I guess if I think someone is a moron, dip$hit, dumba$$, ect I can forgive all that and appreciate their talents. However if I think they are EVIL and have done unforgiveable mean things then it becomes a problem.