We like ASMusic! The resort is smaller and the food court tends to be not as crowded as Pops. Don't let anyone turn you off from the bussing either. ASMusic will have it's own dedicated bus most of the time. The only times you will see bus sharing is at off times (ie. middle of the afternoon, very late at night, etc.)
Because the resort is smaller you have a better chance of being close to the main pool, lobby, food court, bussing, etc. even if you're in a standard room location. They have great pool activities in the afternoon which are fun for old and young alike!
We've stayed at ASMusic 4 times and counting...
*Edit* - the rooms were refurbed back in '07 (I think)... so the rooms are still pretty new at ASMusic