Your all-time favorite opening scene from a film

[K7P5V]

Definitely, my next choice would be...

Roujin Z
(老人Ｚ)

[Adam Allen]

The Godfather. They eloquently tell you right away that this ain't your usual gangster pic, and we're not indulging in the usual optimistic view of The American Immigrant Story.

It is a good one.

[K7P5V]

Definitely, my next choice would be Beauty & the Beast (1991):

[Hulkout42]

The Godfather 1, for me it is that hands down.

[Chris Lang]

LOTS of great choices for favorite opening scenes.

I'd like to add 'L.A. Confidential'. The opening, where muckracking reporter Sid Hudgens (played by Danny Devito) gives his monologue about the glitz and glamour that gets people enamored of L.A. and tells us that all that is L.A. 'selling an image' helps perfectly set the tone for the rest of the movie. The use of Johnny Mercer's 'Accentuate the Positive' in that introduction (and reprised at the ending, which also involves a public image that's at odds with reality) greatly enhances the effect.

And just for fun, I'll add The Lego Batman Movie. "All important movies start with a black screen".

[K7P5V]

Definitely, my next choice would be Ghost in the Shell (1995):

[Jekyll]

The Plaza of Execution from The Mask of Zorro. That had me on the edge of my seat as a kid in 97 or 98.

[K7P5V]

The majority might not agree, but a personal fave would be Josie & The Pussycats (2001):

[From The Shadows]

[From The Shadows]

[From The Shadows]

The majority won't agree, but an All-Time Favorite would be...

Transformers '86

Great one !