As far as creativity goes...hypo/mania is at its peak. I am deeply creative and highly productive. I have never, ever experienced anything but that. I can say that rolling in my creative space does fuel mania though. That may just be me. Its like anything addictive...once i am able to access that imaginative, expansive place...i don't want to leave, so I crave being there and I think that can fuel things for me (in a negative way). Other than that addictive property...mania rocks creatively.