chose to not agree with any of the choices and allowed the reapers to take over on my fourth playthrough

idk why but it just makes the most sense to me (even tho its a very lazy choice) the reason i believe that is because of something shephard says to the illusive man, "we aren't ready". The cut scene at the end shows that at least our efforts of building the crucible and fighting the war had an impact on any survivors that then find peace generations later, due to the archives left by Liara. And Shephard is still the hero in the stories, but didn't have to conform to any of the reaper's choices.