No annoying little 16/17 year old girls. I do NOT want to be your friend.
No "Hi how are you" no "What's up" no "What's down", the sky is up the floor is down.
If you have nothing interesting to say other than "Hi I'm from Asia let's be friends" then don't bother messaging me.
Guys irritate me.
If I don't answer your message it might be because I'm doing something. Someone may be at the door, I may be eating, I may be sleeping, I may be taking a piss in the shower, I may be abducted by aliens or I may simply not like you. So if you send another message asking why I didn't write back then you're blocked.