Best anime girls, huh?.
Always #1 is........Holo (Spice and Wolf), because she's just the entire package. Personality, looks, ears+tail, petite, and class enough to not provide unnecessary fanservice.
Other favourites include...
Rin Asougi (RIN: Daughters of Mnemosyne)
Ami (Sailor Moon)
And I feel like Asuna from Sword Art Online is quickly growing too. Small and frail-looking, same hair style/length, and just as cute at times... she's a spitting image if this girl I've started dating XD lol
I thought what I'd do was I'd watch some anime... oh wait, I already am!