Avatar was appealing to the eye but that's about it. Blow was killer.
I watch so many movies it'd be hard to pick just one (yet alone remember them all.) Lately
Inception takes the cake. Guy Richie's
RocknRolla was pretty awesome too, really wish they made the sequels. Oh well.
Rounders,
No Country for Old Men,
Collateral - they all make the list too. So does
Pulp Fiction,
There Will Be Blood, and
Children of Men. God there's so many...
Princess Mononoke definitely takes the cake for best anime ever.
Children of Dune and
Catch Me If You Can maybe... but I'd have to see them again to be sure. It's been too long.
And of course The Matrix and LOTR trilogies are classics. So will Christopher Nolan's Batman once/if he makes the third installment (R.I.P. Heath Ledger
.)