In one Word
I used to use "undefined" to answer this question all the time because it just meant adaptable, versatile, free, unbounded, with endless potential in every direction. So edgy and profound, I guess, but it's cheap novelty to answer the question with the opposite of itself.
I think today the word is "hungry."
I don't feel like anyone or anything in particular, but even if I was floating in the middle of an electron cloud with nothing else to do but float, If I was still me, I'd be hungry for something. I'd stay hungry and yearning for something I can't identify, like an itch you can't find. Sometimes it's hungry for attention, hungry for affection, hungry for power, success, meaningful interactions. The hungry can't be sated, only bypassed by replacing it with hunger for something else. But right now I'm hungry for salmon rice balls and the thrill of cracking glowsticks. We'll see what tomorrow's like