^If you gear the thread toward the non-standard couples (so no HinataxNaruto, SasukexSakura, NarutoxSakura), then I could see a reason for the thread (though, it will have nothing to do with actual canon knowledge, and ultimately be for fanfiction pairings only). (I say non-standard only due to the fact that the various other relationship threads are more than adequate for discussing what you wish to discuss about the main characters.)
edit: Never mind, I had forgotten the
[Manga] Official Romance in Naruto thread, where you can do exactly as you describe above...