I know I'm in the minority with my opinion that The Aviator is Martin Scorsese's absolute best movie in over twenty years, probably since Goodfellas. It's a jaw-dropping marvel to witness in all aspects of filmmaking.
There isn't a single performance that misses the mark (unless you really want to count Gwen Stefani), the score by Howard Shore is one of his absolute best, the visual effects are tasteful, the cinematography is gorgeous and graceful, and the subject Howard Hughes is in many ways as obsessive and tireless as Scorsese himself. He was simply born to make a Hughes biopic, and he hits a grand slam in every possible way with this one. It will always land among my favorites from the legend.
Oh, and it contains the best work from DiCaprio, too, in my opinion.