Didn't realize how addicting transmogin would be. I have a friend who wants tier 1/2 shammy stuff so I'm like whatever, we bang out the vanilla raids in a half an hour and I get some old BWL weaps that I'm like..man..this shit used to look great. So then I get some BC weaps and now I'm looking through lists of models and shit tryin to match stuff up. I had already decided on S2 warrior arena gear as my main set since it's my fondest memory (OF WHEN I WAS 2900 IN BG9) but also because it's awesome.
It was a subtley MASSIVE addition to the life of the game. Total win/win for Blizzard and for players.
Reusing old art and assets and ensuring they don't go to waste? Check.
Revitalizing old content without needing to modify it at all? Check.
Allowing players to visually customize any of their gear? Check.
Creating a new time/gold-sink with minimal development time? Check.