I hate guilt. It seems like such a useless emotion, to feel bad about something you did, but not actually take any action about it. I try very hard not to make people feel guilty and moreover not to feel guilty myself. This means both trying to avoid actions that I'll regret, but more importantly when I screw up, making it right. In my opinion you shouldn't feel bad about something, you should fix it and if you can't fix it, stop beating yourself up about it. It's unproductive.