Mari. I know it isn't nice to say, but Misato always struck me as being more whorish, which I don't think is the same as being lewd.
Misato strikes me as the woman that sleeps around a lot, she's easy because she drinks too much, and she doesn't seem like she would reject an asshole if he was gorgeous.
Mari, to me, seems to be generally flirtatious by dint of being so happy go lucky. She doesn't really seem to care about personal space, so she ends up close and on you. She knows she's good looking, but she doesn't use her looks as a tool. She has a big chest, so she laughs about it instead of wearing revealing clothes. She seems like the type of person that would choose someone like Shinji (herein meaning plain and unassuming) because she liked him. Rather than going for something like Kaji (herein meaning good looking, well of and well liked if not even respected)
But that's just me.