Wow, your euphoric hypo sounds a lot like mine. I often get obsessed with things and they keep me awake. Usually obsessive cleaning is a part of it, planning how to decorate my house (and later spending money on that), researching subjects I've suddenly become interested in and trying to find all the possible information about that.
I may become interested in new activities that I normally hate. That includes listening to music I have hated before, cooking and baking, trying new recipes (I'm definitely not a person who likes to cook) and then inviting friends to my house to taste these foods I have made. I usually become oversocial, I make phone calls if I can't reach my friends, and when I can reach my friends I spend so much time with them all day everyday that they become tired and start avoiding me. But the crave for social situations will not end, being alone causes a huge anxiety and that's when it's time to make some new friends - usually at bars. Other things that help for this restlessness and "anxiety due to lack of social situations" are, well - being obsessed with something else, like cleaning or shopping impulsively.

Other signs of my hypomania have been some kinds of oversensivity: visual and emotional ones. When I go to a store and see fruits, they aren't just fruits anymore: all the bright colors like orange and yellow make me want to buy the fruits even though I am allergic to most of them. Music sounds awesome, like something heavenly, lights look blinding, not in a bad way - all the lights are just so beautifully overwhelming and I can't get enough of them. I start laughing and crying very easily, more easily than normally. Cute things make me cry, and even my own thoughts can cause bursts of laughter. My friends call me creepy when I start laughing at my own thoughts in the middle of a silence.

I also believe that I am or will become something great, I have plans that will make me famous and I feel more important than other people. Few times I have felt deeply connected with other people and with the universe and some higher powers. The feeling was so strong, it felt like a warm hug, like all the beauty was surrounding me and nothing bad could ever happen to me. Like the whole world was on my side, supporting me. Once I even slightly thought, that I was a reincarnation of an artist that died a long time ago. I thought I was going through his feelings and had his talent. But I am also creative when I'm not high and I have liked painting and drawing since I was a child.

In my euphoric hypos I love the neverending beauty the most. Also love the confidence which makes me feel smart and important and more active socially, because normally I am kinda shy and have low self-esteem. The confidence is something amazing, like, you don't care about what other people think - of course it can also make you act like a jackass.