aramis erak
Legend
This is very subjective. Myself, and the other players in my group, all loved this encounter. There was a dissenting player who didn't like it, and he also didn't like any other encounter that wasn't obviously balanced.
I'd like to add another comment to nay-sayers: please write your criticism in a different thread, as OP is clearly requesting positive commentary.
I found that a particularly fun encounter to run... But I also rolled poorly, and had the dragon not engage until his breath recharged... which it didn't. So they chased out to where they could hit him, and used thaumaturgy to taunt him closer...