I absolutely love Harry Potter and am partially in love with half of the male characters. I only and strictly support canon romance though I will occasionally ship Remus/OC.
James/Lily, Hermione/Ron, Harry/Ginny and Remus/Tonks are mostly my favorite categories but I do love Marauder Era if it includes a lot of romance.
I do not currently have any fics at the moment but I have one formulating in my mind. Of course it will James/Lily and probably during Hogwarts years. It may be chaptered or one-shot. Who Knows.