I get really obsessive about certain things, too, and it drives my husband crazy because I will talk incessantly about a specific topic or get tunnel vision on certain projects. I used to get really frustrated because I felt like jumping into anything headfirst was just a part of my personality, and to some extent, I think it still is. However, sometimes when I get going on something, I start to feel a really jumpy, airy feeling and I begin to lose all focus on anything but that particular topic, project, etc. I don't know if it's mania but it's definitely something I have to manage. It's great for creativity and organization if there's a block of time, but I've definitely learned to put down those types of projects in the evenings or I'm awake forever.