Rachael (Blade Runner):

She almost convinced me to start smoking. And I'm pretty sure I'm a replicant.
Marta (Star Trek):

Her dance totally would have broken me. And her.
Penny (Lost):

She's gorgeous, smart, devoted loves the living shit out of Desmond. I'm pretty jealous.
Juno (The Descent):

She's fucking tough. Not "omg, look how tough Halle Barry was in Die Another Day", but actual, real tough. She put a pick through the head of a subterranean crawler, and into my heart.