1. Scully.
Morgan: What the hell is that?
Mulder: Looks like the fuselage of a plane.
Scully: It's a North American P-51 Mustang.
Mulder: I just got very turned on.

2. Marion from Robin of Sherwood.

3. Martha Jones. Awesome.

4. Evie (from The Mummy). "Oops."

5. Sarah Connor. Humour and anger and protectiveness and vulnerability and lots of really big guns.

6. Fran Katzenjammer, from Black Books.
Bernard: Listen, this whole thing... we're old friends. Don't you think it's about time now, you know, that we actually admitted that we're hugely attracted to one another? You know. Just for the summer?
Fran: No I don't. I think we should wait a bit.
Bernard: Till when? Yeah?
Fran: Until at least one of us is dead?

7. Sam Carter. 'Nuff said.

8. Tia Dalma. Powerful and mysterious.

9. Marion Ravenswood. Takes no crap from anyone.

10. Willow Rosenburg. Funny girl.

---
I sort of wanted to put Teyla on here, but I've seen so little of Atlantis it felt a bit odd. But whenever I run across her in fanfic, she is awesomesauce. Also Rogue, Anne from Persuasion, Vala, Liz Weir, Janet Frasier, Trinity, Sarah Jane Smith, Eowyn, Cally from Blake's 7...
Morgan: What the hell is that?
Mulder: Looks like the fuselage of a plane.
Scully: It's a North American P-51 Mustang.
Mulder: I just got very turned on.

2. Marion from Robin of Sherwood.

3. Martha Jones. Awesome.

4. Evie (from The Mummy). "Oops."

5. Sarah Connor. Humour and anger and protectiveness and vulnerability and lots of really big guns.

6. Fran Katzenjammer, from Black Books.
Bernard: Listen, this whole thing... we're old friends. Don't you think it's about time now, you know, that we actually admitted that we're hugely attracted to one another? You know. Just for the summer?
Fran: No I don't. I think we should wait a bit.
Bernard: Till when? Yeah?
Fran: Until at least one of us is dead?

7. Sam Carter. 'Nuff said.

8. Tia Dalma. Powerful and mysterious.

9. Marion Ravenswood. Takes no crap from anyone.

10. Willow Rosenburg. Funny girl.

---
I sort of wanted to put Teyla on here, but I've seen so little of Atlantis it felt a bit odd. But whenever I run across her in fanfic, she is awesomesauce. Also Rogue, Anne from Persuasion, Vala, Liz Weir, Janet Frasier, Trinity, Sarah Jane Smith, Eowyn, Cally from Blake's 7...
Comments
I like Teyla, but honestly, I think sometimes she's better in fics than on the show! You've got some good ones on your list.
I just realized that aside from images of myself (Aelfpark and Aelfgyfu Teaches Beowulf), the people in my userpics are all men. Hmm.
I'm finding watching Atlantis quite odd, because I feel like I know the characters fairly well, but only through fanfic. I have preconceptions about them all. Come to think of it, I got into SG-1 that way, too. Huh.
I noticed at one point that nearly all my icons were of Jack, so made a specific effort to change it. :D