This is a dynamic list, so it’ll be updated each time I see a film which had its world premiere in 2008 that is better than at least one of the films already on the list.
- Synecdoche, New York (Charlie Kaufman)
 - The Headless Woman (Lucrecia Martel)
 - Afterschool (Antonio Campos)
 - Melancholia (Lav Diaz)
 - Summer Hours (Olivier Assayas)
 - A Christmas Tale (Arnaud Desplechin)
 - Vicky Cristina Barcelona (Woody Allen)
 - Wendy and Lucy (Kelly Reichardt)
 - Julia (Erick Zonca)
 - Revanche (Götz Spielmann)
 
Other 2008 films I’ve seen (In approximate order of preference)
- Our Beloved Month of August (Miguel Gomes) – 7.5
 - Rachel Getting Married (Jonathan Demme)
 - Burn After Reading (Joel & Ethan Coen)
 - Happy-Go-Lucky (Mike Leigh)
 - Home (Ursula Meier)
 - Liverpool (Lisandro Alonso)
 - Two Lovers (James Gray) – 7.0
 - Old Partner (Chung-Ryoul Lee)
 - Milk (Gus Van Sant)
 - The Class (Laurent Cantet)
 - Rembrandt’s J’Accuse…! (Peter Greenaway)
 - Lorna’s Silence (Jean-Pierre & Luc Dardenne)
 - Boogie (Radu Muntean) – 6.8
 - Rumba (Dominique Abel, Fiona Gordon, & Bruno Romy)
 - The Wrestler (Darren Aronofsky)
 - Adhen (Rabah Ameur-Zaïmeche)
 - Martyrs (Pascal Laugier)
 - Transmission (Harun Farocki) – 6.7
 - Hunger (Steve McQueen)
 - Modern Life (Raymond Depardon)
 - 24 City (Jia Zhangke)
 - Frontier of Dawn (Phillipe Garrel)
 - Birdsong (Albert Serra)
 - Mommy is at the Hairdresser’s (Léa Pool)
 - Of Time and the City (Terence Davies)
 - Soi Cowboy (Thomas Clay)
 - Doubt (John Patrick Shanley)
 - 35 Shots of Rum (Claire Denis)
 - Jerichow (Christian Petzold)
 - Involuntary (Ruben Östlund) – 6.1
 - Coal Money (Wang Bing) – 6.0
 - Milk (Semih Kaplanoglu)
 - Let the Right One In (Tomas Alfredson)
 - A Lake (Philippe Grandrieux) – 5.8
 - Tulpan (Sergey Dvortsevoy)
 - The Hurt Locker (Kathryn Bigelow) – 5.8
 - Iron Man (Jon Favreau) – 5.5
 - Sita Sings the Blues (Nina Paley)
 - Journey to the Center of the Earth (Eric Brevig) – 5.3
 - Everlasting Moments (Jan Troell) – 5.3
 - Momma’s Man (Azazel Jacobs)
 - Tropic Thunder (Ben Stiller)
 - Jumper (Doug Liman) – 5.3
 - Mid-August Lunch (Gianni Di Gregorio)
 - Tokyo! (Michel Gondry, Leos Carax, & Bong Joon-ho) – 5.2
 - Surveillance (Jennifer Lynch)
 - The Dark Knight (Christopher Nolan)
 - Goodbye Solo (Ramin Bahrani)
 - Tokyo Sonata (Kiyoshi Kurosawa)
 - Serbis (Brillante Mendoza)
 - WALL•E (Andrew Stanton)
 - This Night (Werner Schroeter)
 - The Christians (Stephen Cone) – 4.6
 - Adoration (Atom Egoyan)
 - Three Monkeys (Nuri Bilge Ceylan)
 - Helen (Joe Lawlor & Christine Molloy)
 - The Curious Case of Benjamin Button (David Fincher)
 - Four Nights With Anna (Jerzy Skolimowski)
 - Indiana Jones and the Kingdom of the Crystal Skull (Steven Spielberg)
 - On War (Bertrand Bonello) – 4.1
 - Treeless Mountain (So Yong Kim)
 - Snow (Aida Begic)
 - Changeling (Clint Eastwood)
 - Antoine (Laura Bari)
 - Slumdog Millionaire (Danny Boyle)
 - Eldorado (Bouli Lanners) – 3.7
 - Waiting for Sancho (Mark Peranson) – 3.6
 - Il Divo (Paolo Sorrentino)
 - Sleep Furiously (Gideon Koppel)
 - My Magic (Eric Khoo)
 - Mamma Mia! (Phyllida Lloyd)
 - Australia (Baz Luhrmann) – 2.6
 - Palermo Shooting (Wim Wenders)
 - Adam Resurrected (Paul Schrader)
 - The Reader (Stephen Daldry)
 - Revolutionary Road (Sam Mendes)
 - The Good, the Bad, the Weird (Kim Jee-woon)
 

Hey! I thought you didn’t hate Wall-E… MLG
I don’t hate it. It is a very annoying, disappointing movie should have better. I only really hate the first 6 on that list.