Unconventional as it appears, I vote for Rain. Simply, he's the mightiest, the most refined, the most mysterious (what most girls would deem 'sexy') and the most cunning of all the men who were one way or another, related to Kitana. As a matter of fact, I'm surprised Rain never seemed to seize his chance to get closer to Kitana, having known her way longer than any of the Earth warriors she hangs out with now.

Regarding the others:

Shao Kahn - old enough to be her father (or older?), plus I bet the mask hides a rather ugly face, so no.

Shang Tsung - might give a kick, but he kinda tends to think and act in the sphere of his discipline and plans only; we know little to nothing of his private thoughts and (romantic) desires. That is, provided we exclude the 'Omegis' thing (can she be deemed 'canon' outside MKC anyway? I don't know.).

Reptile - unless Kitana is a zoophile ...so no.

Liu Kang - had the BEST chance of them all and willingly lost it, now he's a corpse, so no.

Kung Lao - was never even least interested in her, though I actually could imagine Kitana together with him... If Kitana would seek resoluteness and authentic, anti-eunuch manhood in her companion, then out of the two Shaolin monks Kung Lao is her man. Not to mention he'd be a hell of a protector to her, maybe even better than Liu Kang.

Goro - Well, it is not the sentimental chat with Kitana that he makes me think of, if you get the point... But as the topic has 'boyfriend' in its title, the answer is no.

Johnny Cage - for a nuance better defined attitude toward Kitana than Kung Lao's, though I think it's Sonya he'd come down to in the long run.


That's all I can and want to think of now.