Percy, there's always something worthwhile to do in and around Central.
If taking this N11 option into town it's useful for chaps to bear in mind that as the night buses go round the houses at the airport, they can be significantly slower (and with less headway) than one may be used to with the equivalent daytime services. In the case of N11 I learned that the hard way, along with the fact that it got to Sheung Wan after traipsing through Kowloon side and Wan Chai rather than the more direct route the A11 takes. Not necessarily an issue as long as one knows in advance.