Forum:Key Cards of Main Characters

Ok, we all know that Yugi & Atem are some of the sickest anime protagonists ever. It's also really clear what their key card is: Dark Magician. However, as GX and 5D's were produced, the main protagonists appeared to have not one, but two key cards. For example, Jaden says that Elemental Hero Flame Wingman is his favorite card, but he later states that Elemental Hero Neos is the ace of his Deck. Another example is Yusei. Many people claim that Stardust Dragon is Yusei's key card(not that there's anything wrong with that), but he uses Junk Warrior more often than Stardust. So which is it? post your comments on what you guys think.

--E-Dizzle