You can read all about this Transgentrification thing here. In short though they're letting us take our current armor sets and give them the appearance of a different armor set. For example you could take your T12 gear and make it look like T5. If you want to view all of our past armor sets you can check out this thread on MMO-Champion.
At this point I'm rather fond of our current T12 and may just keep that as my look, possibly replacing the helm with goggles. There are two items that are definitively on my list of must haves.
The Wolfslayer's Sniper Rifle - This was the first "real' gun that I ever got in the game. I think it's one of the best looking models, and I shall wreak havoc and destruction with it once again.
Legacy - I've always been fond of two handed axes and this is one of the better ones.
Both items drop from the Opera event in Karazhan. The bad news is I deleted these items a long time ago. The good news is I get to run Karazhan again!
So what's on your Transgentrification list?
