Perhaps I am showing youthful ignorance, but I have to say the 20 year old demographic is as diverse as any other.
Hmmm.
- Cynicism and Absurdism are generally popular
- I'd avoid copping out, and doing something 'like' including the word 'like' to an excess
- Satirical self-depecriation
As for the language, I really can't think of anything distinct to say about it. Except, obviously, avoiding words similar to 'Gosh' and 'Darn'.
You'd probably be safe using your own casual vocabulary. It's just the mindset that is different... How can I put this.
We are at the age where we figure out that it wasn't the world that was stupid all along, it was us, yet we are still largely unwilling to let go of the lifestyle associated with that attitude.
I think that suits me, anyway. I can't pretend to know how everyone is approaching reality. I'm 19, by the way, if that has any bearing on how you interpret this.
Good luck!