And a clean consciousness, Darnit!! Kaidan may have been a jerk in his anger then, but god, Jesus, I loved him. Any relationship I may had had in the second Mass Effect would have been a lie. Thane appealed to me so much, and I was so going to do it, but then with the flirting option I realized my Shep wouldn't say that, and really, it was Kaidan I missed and the conversations with him. And Thane just seemed so level headed, kind of like I thought Kaidan to be, but lacked a lot of the passion he had. Thane was a man resigned, on the brink of death, whatever I may be able to have with him, it was not going to last.
I would be any chances of being with him on the next game, if there was, because I myself don't believe in relationship history interrupted by another person but continuing on.
Sure, it wouldn't be betrayal, not really and Kaidan was being silly, but you what? I would always stay faithful.
And no, Garrus, just no. And not for being a Turian, but his personality only appealed to me as a VERY GOOD FRIEND. I never really considered it, and when the reach and flexibility conversation came, I tried to be as uninterested and unfairly as possible. I actually don't get how people initially attracted to Kaidan, could be to Garrus. And I just keep thinking that it must be the bitter feeling that let them to it, not actual romance.
As for those who chose Kaidan because he was the only male love interest available in ME1, well, those... were being cruel, because sure Kaidan liked you, but if you don't, YOU DON'T!
At least, I think the best way to play Mass Effect, is playing as if the characters were real people.