I was playing with a new character during this double xp weekend, when something struck me: have you ever realised that all bosses have comparable sizes? Sure, there are smaller bosses, like Ksarr and Silknight, and bigger bosses, like Gurgox and Von Gobble. But we have yet to see enormous beasts larger than twice the player's size.
To my opinion, BIG bosses would be a cool addition to the game. Maybe for a next expansion (I don't know, a world in the sky or a volcano perhaps?), I would love to be able to fight a gigantic lava monster or elegant bird with my fellow allies and not just an oversized character with too many hit points.