Exes and Ohs
I have a theory about people... the people that uniformly hate their exes need a bit of help in the forgiveness category.
I'm not saying that hating an ex is bad. There are bad people out there all over the place.
It's like the old saying goes... "you run into an asshole in the morning, you ran into an asshole; you run into assholes all day, you're the asshole." (ok, so from a show... so sue me)
I have a hard time keeping a grudge for long -- especially against a person. (I can be a real son-of-a-bitch against an organization, I tell you what) The same reason I liked someone in the first place is likely why I'll tend to like them in the long run. Even if we're not together I hold my friends close.
I think that's a criterion for me...