Batman Begins is the most important movie of the last decade, and thus justifies any flaws in the films (I personally really liked The Dark Knight Rises, and actually saw it seven times in the cinema. Yeah, I know). In the gamble Warner Brothers took on selecting Christopher Nolan paying off, it allowed other studios to follow suit and offer the 'keys to the castle' as it were to younger, more interesting filmmakers than the journeymen who had been making the big franchise films thus far (Christopher Columbus, Bryan Singer, etc- even more interesting directors such as Sam Raimi felt a need to tone themselves down in order to deal with the franchise, something Nolan did not). He had a vision, and they gave him the money to make it. Since, studios have began to hand out their big projects to smaller directors, leading to the general quality of blockbusters slowly climbing. X-Men First Class was the best in the series thanks to Matthew Vaughan, Amazing Spider-Man was largely unsuccessful, but managed to nail the Peter/Gwen relationship element that would have been targeted when they opted for the director of (500) Days of Summer, and now Duncan Jones has got Warcraft, Edgar Wright has Ant-Man and Gareth Edwards (Other Gareth Edwards) has Godzilla. In a lot of cases, they're dream projects for the directors, added a much-needed enthusasm to Hollywood produce. As such, I won't hear a bad word against the Christopher Nolan Batman saga, as they're making the big-scale American movie experience more bearable.
Oh, and they're all good films.