thats not what this is asking >_< its asking which story was the best. nagrand had almost no story on the alliance side. the horde side was okay but also severely lacking. it was pretty much "derpa der ogres takems beads" the only good part was the demon hunter quest. hellfire was alright but fell off at the end. zangarmarsh.... oh zangarmarsh is one of the dumbest storylines in the game. although the visuals were nice and it is one of my favorite zones the storyline is just awful.
"ummm nerger is terken are waters" why are the naga taking the swamp water? "herp derp for teh lulz" THIS WAS NEVER EXPLAINED @_@ AT ALL. NOT EVEN HINTED AT! they didnt need it to survive because they could survive fine in the water where it was they didnt need to put it in a giant hole and they werent moving it anywhere so what the hell were they doing?
shadowmoon was just awful as well. the place where illidan lives and he only shows up twice once to tell some orcs their idiots and once to babble at you thru a crystal. sure the nether dragons and gul'dan stuff was cool but where was the explanations? why did illidan go insane? why did he become a villain for no reason? why did he attack shattrath? NOTHING. also what was teron even doing? just hangin wit teh fel orcs?
netherstorm was okay as long as you ignore all the blood elves and only focus on the ethereal. why did kael'thas betray illidan? why did he side with the legion? he s a blood elf the race that you know WAS PIVOTAL IN STOPPING THE LEGION AND CREATED THE GUARDIANS OF TIRISFALL @_@ the group that specifically hunted down the burning legion. also why would he go into silvermoon and just start killing his people? seriously? hes just gonna rush in there start killing dudes and steal a naaru? also WHY DID HE NEED A NAARU @_@
bladesedge was fine horde side was actually a pretty good zone with rexxar but alliance side just had nothing it was just "well... we got some cenarion circle dudes and like some baby dragons and stuff..."
burning crusade is the epitome of failed potential