hmm.... so I figured I'd do this since I see a few people and it helps me look at characters I enjoy.
ophelia from claymore-
believe it or not, at first I actually hated this character and would have nightmares with her, but the episodes where she shows up even back when I disliked her were among my favorite, and as much as people in the claymore fandom like to deny it, the angles they used along with the tight costume she wears gave me an interest, and besides, I honestly already liked sociopaths and elves and she's both! so she's the perfect elf. heh. also gave me more of an appreciation for the braided look. you'd think croft would have done that but never taken much interest in croft aside from her looks really. go figure.
#2 Annie leonhardt from attack on titan-
I find her sour nature enjoyable and honestly, seeing the female titan is the only reason I even looked into the series with all the hype the series as a whole was getting. I enjoy both her titan form and her regular self and how even as small as she is she can take on the likes of eren and reiner as if they were garbage to be thrown out. (which they are) her mixed up mindset makes you pity her and her incredible persistance is admirable, even at a point protecting those who get themselves in trouble. and sadly, honestly, she's like the only character that made an impact on me in the series which isn't highly negative. the main trio of heroes I actually despise so the series as a whole gives me little interest, but annie herself is still awesome.
#3 Saber/Arturia Pendragon from fate/stay night-
Saber, someone who is interesting all around in all her incarnations. another small girl with a will of iron and a belief in carrying the burdens of her fallen homeland to such a level it becomes a naive ideology of hers that can never be realized. She is strong of will, an excellent fighter, conservatively dressed for a fantasy warrior and has fun dark versions and chibi versions to herself. it was still awesome how she ate lancer in the comic series when she was a literal lion. heh.
#4 Ayanami Rei from Evangelion Neon Genesis -
This character is the first one I enjoyed from anime from the first anime I officially got into. Severely quiet with a mental issue of believing she is someone disposable because she knows she is a clone ayanami still forces herself to be calm and pushes our not so gallant hero ahead helping him through his own psychological traumas with his father. The first girl in amine I liked and one who hasn't really gone away for me as a muse.
#5 Tia Harribel from Bleach -
Normally I'm not into darker skinned women but Harribel is the exception. she has that constant dark brooding nature has a somewhat ninja like appearance (if you ignore all the skin she exposes) and has a surprisingly caring nature when you consider how she treats her subordinates and the woman is incredibly strong. she had so many features I admired I ended up creating a character based on her that I still use as a primary character. (you'll have to guess who.) though bleach is chalk full of faults, the inclusion of harribel was a definite plus.
I could put more characters into this list, but I won't. You'll have to guess who six through ten are. I'm sure you know some of em. heh. these ones are just my top five currently and it is a list that fluctuates, (except for rei, she seems to stay on there almost no matter what. I think lowest she ever dropped was rank #6. go figure.) hope you enjoy! maybe I'll do one on the guys later on.