I am afraid I cannot give a coherent explanation of my pairings, given they've always been arbitrarily instinct-based ones (read: delusional). orz.
I personally love how controlled their tensions they have towards each other; they seem to have mutual understanding and love, but they are trying not have those feelings get into them because of responsibility/greater good (on Munakata's side), and love towards his own clan (on Suoh's clans). Their capacity to restrain every feels just breaks my heart and makes me want to: "otp: i want to help you."