I really like and admire Roger, but you have to understand that they are often skewed on movies like Tree of Life not because they're all elitest arseholes, but becuase they see a thousand or more movies a year, in Roger's case for what, over 20 years straight?
It gets to the point that a movie that goes unexpected directions or is odd for the sake of being odd will quickly become a standout with them because it'll be one of the few movies that surprised them, while the rest of the public is left confused and annoyed--half with the critic who recommended the movie.
Once you understand reviews through this filter they can still be very useful and in Ebert's case even entertaining in their own right. In the end you have to decide for yourself what you like.