For me it's both. I've always had a hard time controlling myself when I'm shopping, but it got wayyy worse after bipolar symptoms started presenting themselves. Now I have absolutely no impulse control at all.
Also, I've always been liable to do risky things just for fun (like cliff diving, for example) but now I do risky things with reckless abandon, yes still for the fun of it, but much more dangerous things now because I don't value my life