i shortlised the list below:
svc. 9, 16, 17, 18, 19, 24, 26, 27, 60, 72, 74, 83, 88, 96, 98, 99,
100, 147, 170 (includes blue and red plate) 190 . excludes feeder
services
for me i will choose 170 as whenever i go to
johor, 170 will always be waiting, either at kranji or the
ceckpoints 
72, though at my doorstep, is bad even though it rates the best..
waits more than 15 min at hougang int many times.. 
74: only during peak periods, mainly for ngee ann students
CAST YOUR VOTES!!