I've had every single symptom of bipolar disorder (mania and depression) at some point, but oddly enough 'decreased need for sleep' is the one I have the least. I've seen a lot of people talk about staying up for days on end and still not being tired, but that's only happened to me a handful of times (and usually no more than about 48 hours before I crash). During hypo/mania I can get by on less sleep than usual (like 4-5 hours vs my usual 8-9) for long periods, but I still feel tired and want to sleep in.

Goal-directed activity, always always always. I get completely immersed with a new hobby or become entirely romantically obsessed with someone. Also sensory overload, omg the colors.