I used to dislike him personally because he was good. Now I just find myself respecting him more and more each game. I think my sentiment was borne of preferring underdogs and not really seeing him play as much. But being an adult and having a work schedule conducive to watching football probably has been the difference.
The Brady/Manning debate shouldn't exist. They never actually played on the field at the same time. Brady faced a standard cover two defense, one which had mostly been subpar. Manning faced Belichick and probably a better defense, one which created more of a challenge to a quarterback. Manning does all the playcalling for the Colts, and Brady has had someone else in his headset calling the plays. If you switched their places, the Colts wouldn't have had so many successful seasons, and might not even have the one championship they currenlty have had. But Manning on the Patriots would have probably won just as many as Brady had, if not more.