Ron/Hermione
Harry/Ginny
Naruto/Hinata
i guess... i wouldn't put a top3... i can say only those times were really dark... Especially now that JKR admitted that RH is a couple that cannot work well and she have should put her with Harry. Well, it was like a A-Bomb...
but we are pretty OT here..
Well I mean the series itself. Two HP? Wow. Actually, what did they argue about?