Which Pokemon would you choose for your personal sigil and why?

Should this just be my favourite Pokémon?  Is there a reason for it not to be my favourite Pokémon; should I have a better reason than that?

Well, my favourite Pokémon is Vileplume (for reasons discussed herein).  The Pokémon that represents me, that really is who I am and aspire to be deep down, is Druddigon, who lives in a cave being surly and irritable, occasionally emerging to terrorise a village and eat people.  So I guess it’s one of those two (or both; I could have my arms quartered or something, right?).  I hope that answers your question.