The ones in GATA'S free head texture corner. Out of 10 people, 5 wear them and 4 have recolored ones.

Has got to be Emo Head with earphones, and the My Little Pony heads for me.

Yes, definitely too many emo heads

The most used in my opinion are the heads in emo style, robotic style, "pure" style (all white, all black, all blue, whatever), with two eyes and a mouth poorly designed, anime style, tribal and flags of the countries of their respective owners.

Low resolution emo heads... They're EVERYWHERE!!!

Mostly, overused ones are the emos and the headphone ones.

Head colored with 1 color that goes with the force/relax/gradients ect...

my eyebrows feed upon your hatred

With that said, i see an overabundance of anime-styled heads that aren't really all that well made. On top of that, i also prefer it if people style their heads more after their own personality rather than just going for maximum Coolguy McDarkdude Awesomeson.

which also reminds me that i should make myself a new head and/or texture set

Emo heads and maybe shitty google images of random pictures.

And on some occasions, c/p tribal.

All I see are poorly mapped ninja heads.