I feel so bad when I think back to times that I got angry and yelled at my kids for no real good reason -- just a combination of the day's events and feeling irritated, really.
Yes! THAT I feel good about! Making a point to use it as an opportunity to talk. I've definitely used it when it comes to the way others might act -- emphasizing that it's not about *them*, it's really about the person and where they're at.
I do look at that as a strength, in anyone. Being able to say "I'm sorry" and "I made a mistake."