Nausicaa of the Valley of the Wind (風の谷のナウシカ)
Nausicaa of the Valley of the Wind (風の谷のナウシカ) by Hayao Miyazaki :) I'm fan of both the manga and the movie
Inuyasha (犬夜叉) by Rumiko Takahashi :D This series has so many interesting characters :D It was fun drawing this! Shame Sesshomaru's pretty face is hidden.
Gwendolyn from Odin Sphere, a Vanillaware game.
Ghost in the Shell
Bato, Motoko and Tachikoma(s) from Ghost in the Shell by Masamune Shiro, with many adaptations :) I'm a fan of Stand Alone Complex anime series, but the original manga and movies are also amazingly good.
Patlabor 2: The Movie
Captains Nagumo and Goto from Patlabor 2: The Movie (1993) directed by Mamoru Oshii. I'm specifying this film since the original manga series has been made into TV anime series and other films but I'm only familiar with this specific film. It's one of my favourites of all time.
King Kazuma from Summer Wars (2009) directed by Mamoru Hosoda!
A Certain Magical Index (とある魔術の禁書目録)
Misaka from A Certain Magical Index (とある魔術の禁書目録 or Toaru Majutsu no Index).
How to Train Your Dragon
Hiccup and Toothless from How to Train Your Dragon (2010). I like the second film as well.
Ryoko and Ryo-Ohki from Tenchi Muyo! I really have no idea what was going on with that anime series and I don't even know which branch I watched, but I liked these two characters.
Hachi and Ai from Planetes. It's a well made anime series, so if you haven't seen it already, give it a try!