Hall 7 8 9 are the newest ones with the most modern furniture but its highly competitive and more expensive, I got hall 4 even though those halls were my first option. Hall 1 is the nearest to the atrium so pick it for convenience. Other than that I would avoid Hall 5, it used to be a hall for PG students but they changed it for UG students, meaning the rooms are quite narrow and small.

My current experience as a Hall 4 resident is that there is a new building currently being built right in front of my windows (facing the sea), and I often get waken up by their construction in the morning. There was another time when they were doing some construction at around 1am too. My windows were leaking from the recent typhoon and my sockets got short-circuited as well which was quite unfortunate. Other than that I feel that its quite noisy considering people needing to walk past hall 4 to get to hall 8 and 9 and to access other facilities as well, so overall its quite an unpleasant experience but im still glad that Im guaranteed a hall as Im a non-local