#1. Elena--Uncharted. Love of my life!
2. GladOS--Portal
3. Ellie--Dead Space 2/3
4. Chloe--Uncharted 2/3
5. Ellie--The Last of Us
6. Elizabeth--Bioshock Infinite
7. Lara Croft (old Lara)--Tomb Raider

8. Sacgirl--LBP

9. Fetch--inFAMOUS SS (tho they did a horrible job of developing her character and screwed up by not putting her in the game more)

That's all I can think of.
Still have to play the Half Life games. I'm guessing Alex would be added to my list after playing that series.

Not in any order, except Zelda and Melia are probably #1 and #2. This WAS difficult, as others have pointed out. Not sure this is REALLY my top 10, but it'll do for now.

Zelda (Ocarina of Time and Skyward Sword in particular, Also my main since Melee in Super Smash Bros.)

Melia (Xenoblade Chronicles)

Sharla (Xenoblade Chronicles)

Chun-Li (Street Fighter series)

Cammy (Street Fighter series)

Rose (Street Fighter series)

Princess Peach (Super Mario Bros. 2, Paper Mario 1 & 2, Super Smash Bros., Super Mario 3D World, Mario Kart, Mario Sports)

Dixie Kong (Donkey Kong Country series)

Palutena (Kid Icarus: Uprising)

Lucina (Fire Emblem: Awakening)