We like Buildings 23 - 27 for it's proximity to Hospitality House / Community Hall / Main Pool. An easy walk and not as much traffic to contend with as you get from buildings 11 - 14. Plus if you miss the bus at Peninsular Road (just outside Building 26), you have time to walk up to HH to catch it (even if you see the bus coming back at Peninsular, you can make it to HH because it still has to go to Miller's Road).
I know you can hop on a bus to take you up from anywhere, but it's nice to not have to wait for the bus just to go play air hockey, etc.