I'll go with being a kid. You get to express yourself in whichever way comes naturally to you, running free with playfulness and creativity. You dream in the purest form because no one tells you, "be realistic, that can't happen." Your emotions are expressed in their purest form because no one is telling you "stop crying, you're acting like a child." Yeah, there is freedom that comes with being an adult, but I don't think it's as beautiful or interesting as the freedom that is lost with growing up.
Yes. 
I would like to be a kid and see what it could be like with (a) different parents or (b) my parents, but my parents now - with all they have learned since I was like 6 years old. Yes, I did have fun ... but it would be nice to be a kid who is allowed to be a kid! Not scared or "What if ..." like 90% of the time.
I would at times definitely go back to being an adult. Mostly because I am learning to stand up to my mother (and my dad as needed) and that MY opinion counts too. And the whole living on my own thing? Like not with mom and dad? Yes, I would definitely do that.
It would be rather awesome to go back to being a kid because then I could be with my pets - yes, former pets - and play and love them up tons and tons more 
~ Platy
I prefer being an adult as you have close to no limitations as to what you can achieve, as a child you are quite limited unless you're a genius, which I am not, nor were.
The possibility of traveling across the world, learning so many new things that you would never be able to wrap your head around as a child is immense.
Plus, you can be a childish adult and combine the best of both worlds :)
@Nextharian definitely a kid! I miss being free from stress and work 😅
@TheStarsAreBlue
But think of all the things you can do as an adult that you can't as a child, like pay rent and pay bills oh wait...
Yeah I can understand that for sure, but having free reins over what to do with your life is a sure fire way to make me sign up :P
@Nextharian yep!
I felt happier as a kid not knowing the things I know today but knowing what I know now I would never want the same childhood I'd only rather be a kid again if I got to live a different life but childhood is so hard kids go through soo much & adulthood isn't much better soo neither lol
An adult because it allows me more control over what's going on. The main thing about my childhood was relying on others and in many cases that just didn't go well. I don't like that uncertainty and lack of control.
a young kid (nothing past 11) because even tho things weren't great, i didn't let my family's problems get in the way of my imagination and happiness. i actually looked at this world instead of just floating through it like a fucking zombie. i need that positivity in my life, its vital for me to get "better", even if i do start trying.
I rather be an adult although it may be challenging with all bills and being all grown up. I simply love it! I have more time to explore the city! It