I was almost 30 when I first started back in 2006. I loved it back then, I love the not-exactly-legal servers, and I can't wait to see what Blizzard does with Classic. I will not be in any hurry to get to 60, I couldn't care less if I get into a raiding guild or not (though I probably will be in one with old friends that are coming back just for Classic), and I can't wait for more news on progress of this project (which probably won't be until Blizzcon).
It will also be nice to play that version of the game knowing what I do now, and I won't be so bad this time that I'll be wearing white/grey items at level 40