Well , I used to be from NUS. Just graduated from there a few
months ago. I will say there is not much of a difference in the
lifestyle of NUS and NTU, whether you enjoy uni life is very much
up to yaself. That is if you want to be more active and participate
in CCAs or hall activities if you gona stay in campus or just go to
school attend lecture , tutorial and do project. Undoubtedly , the
latter will make your uni life dull and uninteresting.
Since you are going into NTU , do apply to stay in one of the halls
and join their orientation to get to know people. Then perhaps join
some committees or participate in some sports to have some fun
outside of your normal school curriculum. This is quite a fail
proof way to enjoy yaself in uni.