try not to stay at the highest floor, water leakage problem might haunt u, if max level 40 then try to stay at level 39.

Another thing u need to consider, developer will tend to allocate lower level car park to higher floor level owner, let say u stay at level 38-40, higher chances developer will allocate car park at level 1/2, no need to turn so many times and waste time in the car park.