Meh, this kinda reminds me of the episode of Family Guy when Peter had his own theme music thanks to a wish made from a Gene. The music started to annoy everybody, especially a guy in a bus that Peter was taking...
While I would love some more music, looping some of the tracks wouldn't be a good move. Look at the Stormwind theme and think how akward it would be looping that. Though I would say I would love to get some good looping music for high level instances and especially raid bosses. You know, something epic to stab to. If there is any, cool because I can't wait to hear it ;)