Miranda: King of....freakish, in appearance. The RL actress who they based her off of and did her voice? Awesome. Miranda? Not. Terrible personality and the body is just 'off'.
Ashley: She's kind of got that 'plain'ish charm in the first one. Sure, she's got a xenophobic problem, but not nearly as much of one as a number of Cerberus personnel. That, and from the scan in ME3, she looks pretty awesome. Enough so that I'm replaying as DudeShep to see where that goes,

.
Tali: She has that quirky, naive, kind of innocent charm. That, and the fact that you honestly have no idea what she truly looks like adds a layer of interest to her.
Jack: Sure, she's violent and angry at the beginning. Advance that relationship, however, and you have someone who is truly broken trying to start putting the pieces back together. It's an interesting relationship.
Liara: I never truly cared about Liara tbh. I only really ran with her on my main FemShep simply because she beat out Kaiden. Her personality, her looks, ect. Never truly cared for her. In the first one, Ashley wins every time for DudeShep.
Samara: Kind of interesting...but no, not THAT interesting. Sorry.