Not really fair to compare Gotham and Flash but they 'are' shows set in the DC Universe. Anyway, with Flash I was hooked two minutes in (even before the powers) and was very sad when the episode ended because I wanted more. With Gotham, watching it is frankly a chore, I was meh on the pilot and have only watched the first 3 episodes to see if the show improved and for me it hasn't. I'm on the verge of dropping Gotham. This may be hyperbole but The Flash is the best superhero pilot I have ever seen.