I was a day one WoW player. I changed servers on day two because my first server kept going down. I played WoW for a long time almost six and a half years on that day two server. However, I really dislike GC's direction for taking thought and planning out of character building. I do not plan on returning to WoW.
I really have been enjoying SWToR. SWToR is my new MMO home. I have tried other games (Rift, AoC, etc), but none were nearly the enjoyment level that I got with WoW. SWToR is the first game that I enjoy more than WoW.