I-I dunno. It might have started with the drama CDs, because they are so OTP in there it's hilarious, what with Kittan being the damsel in distress and leaving 158 voice messages on Kamina's cell phone. I swear the whole rivalry thing is just a cover for a gigantic mancrush. But then Kamina reciprocates with the "Fated Rivals" thing and it's adorable.
Then this just sealed the deal:
Afterlife BFFs omg.
...It feels weird because when it comes to more popular slash pairings like Kamina/Simon, Simon/Viral, Simon/Rossiu, and etc, I prefer them being merely platonic, so I'm not sure why that's different when it comes to Kamina/Kittan. (Well, maybe part of it has to do with the fact that I can't see Simon with anyone other than Nia.)
I can at least take comfort in the fact that I'm not slashing them just because they're hot guys, right? .__. Also there's no seme/uke thing because they're both such LOUD MANLY IDIOTS.
Also, I still like Kittan/Yoko too.
EDIT: Trying to remember other slash pairings I support. I'm usually more into het, but there are a few...
-Wolfram/Yuuri (Kyou Kara Maou)
-Francisco/Curio (Romeo x Juliet)
-Scar/Yoki (FMA) [this is more like a crack pairing lol]
-Viral/Rossiu (Gurren Lagann) [drama CD again orz]
Is there a pattern in this? I can't tell. XD;;