Just for the hell of it I'll say this:
My favourite card and the one that symbolizes me as a duelist (like Blue-eyes represents Kaiba, Dark Magician represents Atem, Flame swordsman -> joey, etc.) would be my White-Horned Dragon. It has been a very helpful card in my deck, and always brings a smile to me when I draw it:
Single tribute summon, good effect, decent ATK.
EDIT: Cool story: I remember once I was dueling a friend in real life, and I will always remember how I summoned White Horned that time. We were playing with banned cards btw because screw the rules.
My opponent tribute summoned his monsters to play Blue-Eyes White Dragon, and hit my life points directly. It switched to my turn, and I had the perfect hand for the moment to be a total ass to him and still look awesome.
I played the card "Soul Exchange", which allows me to use any monster from the opponents side of the field for any kind of tribute I needed, whether it be for a card effect or summoning. And I used his Blue-Eyes White Dragon as a tribute to summon my White Horned Dragon, and since he was normal summoned, I was able to use his effect. I removed 5 spell cards from my opponent's graveyard, which resulted in my White Horned Dragon's attack to raise up to 3700 point! If that wasn't enough, I used Monster Reborn to bring back his Blue-Eyes to my side of the field.
White Horned Dragon - 3700 ATK
Blue-Eyes White Dragon - 3000 ATK
This was far enough in the duel to wipe out his life points.