My favorite examples of what I'm looking for are: Kanoko (Koi dano ai dano), Kiri (Beauty Pop), Hana (My heavenly hockey club) and Sunako (The Wallflower). What I find very amusing about these type of characters is that they can protect themselves, they do their own thing and don't want to be bothered...which happens to be really funny when having to socialize.

I've also read Skip beat and Last Game which are Ok but the ones I wrote ↑above are the ideal ones.

Please DO NOT recommend:
Orange marmalade, Kaichou wa maid sama, Special a, Akuma to love song, Watashi ni xx Shinasai, Suki tte il na yo, Steel rose, She's scary, Dengeki daisy, Koibana koiseyo hanabi. Since these heroines are way too concerned about what the male leads think about them or are constantly waiting for their prince to save them, which I really hate.

Hope I was clear enough, thanks in advance!