Hm... thinking of it I should have made this poll multiple choice, but it's too late for that now *estupido*.
Anyway, here's my story ...
My FemShep Infiltrator avoided romances in ME1 because Kaidan was a whiner and Liara was not quite to her liking, either. In ME she checked all options and ended up with Garrus - twice (replayed it just because I wanted to try out some other options - but I couldn't).
What's not to love about the guy? He's badass, he's a dork, he desperately wants to do good but brings death and destruction wherever he treads, yet he doesn't whine half as much as Kaidan did, and his (German) voice is ... uh ... very sexy. I liked Jacob, but he was just a tad TOO noble and good for my taste, felt more like a brother to me ... and Thane? No thank you. Too much of an emo goth for my (and FemShep's) taste. Too introspective. And while I like snakes, his skin creeped me out. No no, I prefer Dragon Cats.
Kelly might have been another option just because she's cute, but not as long as Garrus was present
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My MaleShep Soldier went for Liara in ME 1 because he/I found Ashleys personality to be really, really ugly, somehow. But quite contrary to my FemShep he was a nice guy and tried to be everybody's darling, so he was friendly to all the girls in ME2. He ended up with Jack because Tali (his second favorite) was good and nice, anyway while Jack could use that little extra portion of love to become a nicer person. Hehe, he's a Samaritan
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Samara was not a full-fledged romance option, but you could have an affair, same with Morinth (*shudder*). I still included them.