I started playing World of Warcraft in the early Beta days. I remember when instead of riding Kodos, Tauren instead got 'Plains Running' and would get on all fours and run. Blink was a talent point, and Arcane Explosion wasn't an instant cast. Hunters were the worst class in the game, and out of combat rezzing was a viable raiding option. Needless to say, the game has changed a lot in the three years I stopped playing.
My brother and I shared an account, partially because we had delusions of being a hard core raider and two people playing the same character would be more efficient, partially because we had one computer in the house for four people and our parents were less than sympathetic if they wanted to check their email and we wouldn't get off 'because we're about to take down Majordomo and I get dibs on the Eye if it drops!' We mostly played as a priest, but also had a hunter and mage alts that were 60 as well as loads of 20-40 alts of pretty much every class.
We both thoroughly enjoyed PvP, we didn't play on a PvP server because how hard it was to level, but the battlegrounds were always a source of great fun. In the old days of the ranking system, we got to level 9 out of 14. I don't really know what the equivalent would be anymore.
Eventually we both lost interest, him first then me. Real life friends quit shortly after going to college as did I, as new experiences that college offered overrode retreading the same old three year old content. He eventually got pneumonia and had a month where he was stuck at home and got Burning Crusade as something to do, but I never really played it. The only thing I really miss about the game is PvP, I really like multiplayer games and the experience WoW offered in its battlegrounds is radically different from a game of Counterstrike or Halo, where having a hair-trigger reflex is not as important as understanding your class, and your enemies.
So far, my second romp with World of Warcraft issimilar to the days when I used to play. There are still radical changes, such as mounts at 20 and 40 and they don't cost 45g or 900g anymore, drastic improvements to the UI and talent trees again getting restructured, but at the heart, the game is still the same. Barrens chat is still silly, Channel 2 is still useless and filled with arguments about religion and Chuck Norris jokes. If anything, the game seems easier. Maps show where quests are, there's the 'buddy leveling' system, players get mounts earlier and cheaper. I'm not complaining, it does apply more to the 'casual MMO' player, but the older, more 'hardcore' version I started with compared to the modern WoW makes everything feel less like an accomplishment. Granted, an 'accomplishment' in an MMO is really nothing to brag about, I can't put in on as resume and it's not a story worth telling my grandkids. I guess it's just another does of the 'heroin content' that keeps games like this going.
Not all is bad though, I've done the majority of the leveling with other people I know and see on a daily basis. It's also quite interesting observing people with limited or no experience with the game. Playing through a different perspective, less like a gamer and more as an observer / scientist / artist has offered a new perspective but does not completely freshen the game for me. I am still enjoying the experience, I'm just not as seriously invested in it like previous times.