Have you checked the docks just up past your ship for a keeper? There's 3-4 in the presidium as well, especially off to the sides where you wouldn't normally go.

Ashley and Wrex was my team the first time I played through the game so I was excited, but then you changed it I like Garrus a little more in the other games than this one. He's alright, but choosing between him and Wrex I just like Wrex better. Sure, he just went in and shot the guy, but you knew he was a merc hired to do just that I've never liked anything about Kaidan. I like talking to Tali, but she's rarely on my team.

Onward, to space!