Love Peter Weir, he nails it every time.
Master and Commander is one of my all-time favourite films

I LOVE Master and Commander! Fantastic film (one of my favourites as well) and I really wish they could have done a series.
If you asked me this question when I was growing up, I would have said Spielberg, hands down, with no other director coming close. His early movies are fantastic and among my all time favourites (CE3K, Raiders). But by the mid/late 80s and going forward, I started to get really disappointed with his movies. I haven't liked any of his movies nearly as much as the early ones. Minority Report and War of the Worlds and even Munich gave me hope that he was back on track, but then he did Tin Tin and War Horse...
Great clip, and Kudos to Gilliam for speaking out against Spielberg!
So in no particular order:
Spielberg (early)
Ridley Scott (also early works, as he's been very hit or miss for many years now)
David Fincher (I can count on him for a solid movie every time, with stunningly beautiful cinematography)
Chris Nolan (same-ish)
Jon Favreau (same, but more standard fare)
Honorable mention:
Marc Forster - He has done some so-so movies, but for the most part they are solid and I also love his collaborations with MK12. It's someone I keep my eye out for.
There are also a couple of directors that have directed some of my favourite movies, but I don't necessarily enjoy much of the rest of their filmography. For instance, Atonement by Joe Wright is one of my all time favourite movies, but I don't really like his other movies (maybe Pride and Prejudice). I also love Amelie, and I think Jean Pierre Jenuet is generally a great director, but again I don't enjoy his other movies nearly as much.
I don't want to get chastised for not including Kubrik or Kurisawa or Scorsese. They are undoubtedly great directors and I can appreciate their movies for being timeless works of cinematic art. But I personally don't
enjoy their movies at the same level that I do the other directors.