The answer is subjective as it depends on where you live, which impacts commute time (those living in the North Shore have it fast as they reside closer to the city center while those living in the West have to compensate 60 minutes or more in order to reach the CBD by train) and the worst lines to take are T2 and T3 in my opinion due to them stopping pretty much 31 stations (some are skipped, more like 24) along the way before reaching the city.

Well, you have no choice but to take either line if you reside in those areas (Liverpool, Fairfield, Granville, Regents Park) meaning the commute will take longer opposed to those residing in Revesby, Glenfield or Campbelltown where the T8 line is present since it skips 8 stations reaching Wolli Creek then through the Airport. Even from Parramatta you’re taking it through T1 which intersects with Granville. Don’t even talk about the delays or “industrial action”.