My favourite scene...
Definitely the Barkeep meeting the Fizzle Bomber. This scene is so beautifully weird, and the interaction between these two characters (same character, but obviously separated by an ocean of time) is just mesmerising. Ethan gets a great chance here to have some fun, and the humour is a welcome relief.
I wish we could have seen more of this! But despite what you think of the movie, whether you liked or didn't like or agreed or disagreed with some of the time travel elements, this was a great twist, and I really enjoyed seeing Ethan played off against himself.
Just a shame the movie didn't end there, and had to cut to that ridiculous sequence of faces to spell out the entire plot. I'd like to think the audience would've been wise to the twist by then, but hey ho!