When it comes to the ways I've treated other people, I have regrets in a logical sense. When it comes to the ways I've treated myself, I have regrets in an emotional sense. For instance, I once told a lie that badly hurt the one person who cares about me the most and has sacrificed the most for me. Our relationship has since healed, but it took years. In retrospect, probably a bad idea. : P And not a good reflection on my character, either. However it's not a subject that I feel anything about. But when it comes to self-sabotage, like letting a friend I valued drift away, or not grabbing opportunities that I had when I was younger, those are emotional regrets.
But I have few either way, and don't think about them very frequently. I'm a future-oriented person.