Burning Crusade would get my vote. The game was still growing, the 5-man heroics kept the end game interesting for small guilds, players still had to work hard to advance (none of that 0-to-60 in 5 minutes crap) and the "trinity" hadn't worn itself out. I quit right after I plateaued in WOTWK. The idea of grinding up to all purples again just turned me off. I played for about 2-1/2 years, but I have no desire ever to return.
The "golden age" will always be the late 70's through the 80's for me. We're living in a "modern age" of gaming goodness, but a golden age needs time to properly critique. That's why I hate whenever someone describes a new game as "the best game ever".
Hmm, yes and no. The older I get, the more stuff I refused in my youthful ignorance appeals to me. In my preteen and early teenage years, I was mostly Top 40, in high school I was classic rock, in college it was all alternative with some punk mixed in. Also, my introduction to Jpop was back then. As an adult, I've learned I don't need to restrict myself to any one genre. I can freely enough everything from Buffalo Springfield's Mr. Soul to Perfume's Secret Secret. So, yes what I am open to has expanded over the years, but I haven't abandoned anything I loved long ago.
I'm not sure if I'd say I can't stand COD, it's just I have almost no interest in it anymore. I used to love it with 2, 3, MW1 but somewhere around MW2, they seemed to abandon the single player campaign for the multiplayer. I don't care for competitive multiplayer all that much for a variety of reasons. Yes, the series did suffer from over saturation, but so does Assassin's Creed. COD just never tried really take the campaign to the next step.
Sounds awesome. Morrowind was a much freakier world than Oblivion or Skyrim, so this mod is quite exciting. The thing I wonder is how will it compare to The Elder Scrolls Online. I have to assume that the MMO will allow you to explore Vvardenfell, the setting of Morrowind, as well.