(Opinion) what’s the best line in the subway system

Over the past calendar year, I’ve noticed a lot of people expressing their displeasure with the 4/5 trains. I understand the interlining and Rogers Junction argument, but imo, I firmly believe that the 4/5 combination makes for one of the best lines (when it’s running). The 4 alone takes the cake with 8 minute headways during off peak hours, and 3-6 minutes during peak hours.