... How do they all look so gods dam cute? I love the headcanons about these guys and, well, just these guys in general actually.

One of the reasons I love Hetalia:
There is a large amount of characters. And characters of characters. And characters of characters of characters.

Let me demonstrate with my glorious assistant... Drum roll please. - Me
*drum roll* - Prussia
IGGY! Say hello Iggy! - Me
How many times Seaweed... MY NAME IS NOT IGGY! ITS ARTHUR! - England
*shrugs* eh. Favouritism towards America again? *giggles* - Me
*blushes* - England
ALRIGHTY THEN! LETS GET TOO IT! - Me

So, there are:
The normal countries.
The Nyo's.
The 2p's.
The Nekos.
The Chibis.
The Oni's.
The Gauken Hetalia's (I didn't spell that right...) (highschoolers basically.).

And you can an infinite mix of at least two. Sometimes three.
For example...
2p!Neko Hetalia.
2p!Countries.
2p!Gauken Hetalia.
2p!Chibis.
2p!Nyo.
Neko Chibis.
2p!Neko Chibis.

Ectttttttttttttttt because I'm too lazy to put them all. XD