guild wars or world of warcraft

i don't know which game i'll buy in the next couple of weeks. have any of you loyal kidpurple fans played either of these games. i played guild wars in one of the beta weekends and thought it sucked, but it could have improved a lot since then. i wish WoW had a demo that you could play..... either way, i'll be looking for others that play whichever game i do decide on buying.