Deathknight tier 10 set, because that was in my opinion one of the best looking sets in game, it just really fits the deathknight.
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Pally T2 because judgement just looked badass
Tough one, but my favourites were from TBC, as either Tier 5 or Tier 6. In the end though, I think the Tier 6 Warrior set is my favourite. It just looks like it'd be painful - incredibly so. If you saw that thing running towards you, you'd best hide or risk being crushed, not only from the beast running towards you in it (preferably a Tauren), but the spikes too. Also, it went great with Bulwark of Azzinoth. Much pain.Honourable mention to Warlock and Priest Tier 5, and Priest and Paladin Tier 6.
I like the Paladin's Tier 2 armor (Judgement Armor) because of the kilt and cool helmet. I also liked its re colorings in the Burning Crusade.
Wearing Deathmantle, others could easily see death was near.
The best Set was Arcanist, The mage 1st epic set, the ground-breaking. Leaving you with a tast of joy that you did something cool, hard and fun, making you to feel like you did a great deal.Also I really loved the Arcanist Crown it was really stylish.
Rogue Tier 7 was the best, the overall look of it made it out to be a force to be reckoned with.. I especially enjoyed the face piece as it looked like you were getting killed by a mime. :)
Onslaught armor... warrior tier 6. While some other earlier sets looked awesome as well, this set truly made you think "whoa, that guy is quite literally a TANK." Slap a pair of cannons on the shoulders and it truly would have been :D
My favorite is the Bloodfang Armor (Rogue T2) mostly because i've loved the looks of it since i first saw it in the Machinima video Blind, I've then read much about it and i'm trying to get it on my own rogue now. I had the helm from Onyxia in Wrath when it was good due to the looks.
My favorite tier set has got to be rogue's T5 because the thought of a player coming out of stealth and see him with his skull helm and awesome gear. Its like death is coming after ME. It's what nightmares are made of!
tough call - but the first thing that comes to mind when this question comes up is Judgement. Paladin T2. The long cassock, the hooded helm, the sword and book on the shoulder. it was just absolutely gorgeous from head to toe.
I've had 4 druids over the course of WoW, and all 4 of them are feral (and have been since feral became a viable option back in classic/start of BC). My favorite set is probably original Dreamwalker (Druid T3). I did enjoy the Valorous Dreamwalker set, however, the lines and colors of the original Naxx Dreamwalker was better because of the lack of those things that looked like blue crystals at the extremes of the valorous set, despite it not really being a feral set.
This isn't easy, but I gotta say the Paly T2 set has got to be one of the best looking peices of armor to ever come out of this game. That thing screamed "I'mma get you and you ain't gonna like it"