I'm not BPD, but I am bipolar.

I opt for taking ownership over eeeevveeerrrythinng (I have the opposite problem from you I think - I blame myself for things that are by far NOT my doing). But when it comes to my bipolar actions, those are me. Ultimately I made that decision - even if I was influenced by the bipolar. Just like when I'm drunk - I might be drunk, but I still made my decisions. (Difference being that I also made the choice to be drunk whereas I don't choose when to have a depression or hypomania!).

Like Trippin - when I take ownership of things, I feel more in control and have been more able to focus on changing the behaviour. Like.. when I'm in an up I might WANT to spend alllllll the monies on random things. If I didn't take responsibility for myself and my actions, I'd likely go broke. Instead, I have set up the guideline that if I want something expensive I need to wait a few months and see if I still want it (I did this in regards to getting a tattoo this year! I decided on it in September and didn't get the tattoo until July).