I just want to start a thread and see replies.
While its very easy to hate WOTLK for the constant changing of the raiding system, undertuning the fights, giving out free loot (VOA or FL anyone), but it had its creative bossess too - some new mechanics and ideas we didnt see (or didn't see much) in the past.
I want to give my perspective on what I liked:
Naxxramas 2.0
- Not having seen original Naxxramas, even though we blasted through it, Instructor Razovious was a good fight with MC-ing adds that "instructor" trains to be able to take down boss. That was a cool idea.
- Heigan dance was fun to do. Nothing new, but laughing a lot if someone failed.
Ulduar
This instance really showed that Blizzard can do good stuff if they have to. And they had to, given the large outcry from raiding community on delivering too little, too undertuned for WOTLK. Ulduar was fun - nearly all hardmodes were really-really excellent - straight up to the fight of Algalon, which deserves a special mention due to how great it looks. As you might be tired of ICC, go back - its worth getting to him.
- Auriaya - this boss demanded a very different tactic for defeating her, than usual bossess - her panthers were deadly, and kept the adrenalin flowing for tanks and healers alike. Very well done fight.
- Thorim - Splitting your groups into two, fighting off baddies one way, while another stands its ground in the middle waiting for all to arrive, is a great experience. Phase 2 was a complete different fight. Complex to do by Blizzard, but gets my hat off.
- Mimiron - Four phases, even the normal mode needed some tries to get down - and firefighter was a real hard, bad bad encounter that you will no doubt remember if you done it. Even without hardmode, this was a fun fight - one robot, yet so many ways to fail!
- Vezax - The mana management of this fight was a great concept. If undergeared seemed incredibly hard at first.
ToC
Received the most hate from raiders - mostly due to people becoming sick of looking a circular gray, bland room for so many hours, day after day. However it wasn't too bad from raid boss design:
- Northrend Beasts - Fun in this fight was to get through the 3 beasts. Good finally we didn't have to fight just one boss for loot.
- Faction Champions - Really great idea to fight faction champs of other side. Loads of tough cookies if you didn't have the right strategy or some minor PVP skills.
ICC
Final raid, 13 bosses. What I will likely remember is
- Valitharia - Healing up an NPC to win the fight is great idea. More variations like this, please!
- Blood-Queen - Turning your raiders into vampires is a great concept, also nicely done as DPS race on heroic.
As said, this is not measuring the fights from an "epicness" perspective, but new ideas in the raids (out of the over 50+ bossess we have seen - many have had features used from the past). These bossess I liked due to bringing something new. What about you?