Guild Wars 2

Just write down your top 5 boss encounters, where to find them and what is the “special” thing that makes them your top 5 (and perhaps a short explanation how the encounter works for players who didn’t fight them yet).
Perhaphs this could help the design team to identify the really cool encounters and what is making them this cool =)
>> Just regarding the boss encounter itself, not the whole dungeon or whatsoever <<

My top 5 (probably forgetting someone):

1) Boss: Molten Berserker + Molten Firestorm
Where: Molten Weapons Facility-Dungeon from Flame&Frost
What: Fighting two bosses on a small platform, while one is attacking in close combat while the other one shoots AoE-attacks. Be careful to not fall from the platform =)
Specialty: Player need to pay attention to two bosses, boss attacks match pretty well, while not totally overloaded with boss-effects

2) Boss: Rampaging Ice Elemental
Where: Underground Facility Fractal
What: The boss needs to be lured under buckets of molten ore while a player activates them by using control panels on platforms near the buckets.
Specialty: While the task of luring itself is pretty easy, accomplishing a victory needs good team qualities. Interesting and still easy to understand.

3) Boss: Giganticus Lupicus
Where: The Ruined City of Arah (explorable)
What: Boss attacks with different stages, shadowsteps,…
Specialty: The different stages of the fight keeps it challenging, always need to adapt the new attack-style.

4) Boss: Legendary Imbued Shaman
Where: Volcanic Fractal
What: Boss attacks with fireballs. Sometimes is invulnerable and heals by feeding from npcs, enough dmg can stop him. Player will burn when standing still.
Specialty: Some pretty awesome rescuing moments (because of burning when standing still to revive).

5) Boss: Ginva The Butcher
Where: Honor of the Waves (explorable)
What: Boss hits pretty hard, can pull people into him, throws frost AoE on the ground, and spins around (reflecting projectiles)
Specialty: Players really need to watch which skill is being activated, constantly kiting him (with stairs to help to kite).

1) Molten Berserker + Firestorm
— No description needed

2) Giganticus Lupicus
— No description needed

3) Iron Forgeman (SE Story)
— Very different from most boss encounters. The boss shoots a laser that will KO you unless you’re standing in one of the several walled areas. Afterward it will dump lava into these walled areas, so you need to get out (but you better get back in quickly). When the grub spawns from the lava, you kill it to receive a boulder to throw at the boss to damage it.

4) Legendary Imbued Shaman
— No description needed

5) Searing Effigy (COF P1)
— Yeah, yeah, I know, but honestly I like this boss. It’s very predictable, so if you know the boss’s attacks and use your dodges wisely, you can kill it without taking any damage.

Honorable Mentions
— Lt. Kholer
— Subject Alpha
— Gaheron Baelfire (COF Story)