Again, not a database, just post your list and edit them in the post when need

my favorites from the 2000's

1. The Royal Tenenbaums
2. High Fidelity
3. 24 Hour Party People
4. Shaun of the Dead
5. Once
6. American Splendor
7. Eternal Sunshine of the Spotless Mind
8. Lost in Translation
9. Adaptation
10. Rachel Getting Married
11. Serenity
12. Dancer in the Dark
13. A Scanner Darkly
14. The Hangover
15. No Country for Old Men
16. An Education
17. Ghost World
18. There Will Be Blood
19. Winter Passing
20. Spirited Away
21. I'm Not There
22. A Mighty Wind
23. Gone Baby Gone
24. Shaun of the Dead
25. The Squid and the Whale

1. Donnie Darko
2. Children of Men
3. Gladiator
4. Into the Wild
5. Sin City
6. The Lord of the Rings: Trilogy
7. Memento
8. City of God
9. The Departed
10. Moon
11. Requiem For a Dream
12. The Machinist
13. Pans Labyrinth
14. Hot Fuzz
15. 28 Days Later
16. WALL-e
17. Spirited Away
18. Inglorious Bastards
19. 3:10 to Yuma
20. Luck Number Slevin
21. The Illusionist
22. The Last Samurai
23. Shaun of the Dead
24. 40 Year Old Virgin
25. The Prestige

this order always changes
1-3. Eternal Sunshine of the Spotless Mind, Adaptation, Synecdoche NY
4. In the Mood for Love
5. Ratatouille
6. In Bruges
7. Pan's Labyrinth
8. Inglourious Basterds
9. The Life Aquatic with Steve Zissou
10. Bad Santa
11-13. The Lord of the Rings trilogy
14. The Pianist
15. Punch-Drunk Love
16. The Departed
17. Gladiator
18. Wall-E
19. There Will Be Blood
20. Jarhead
21-23. The Bourne trilogy
24. Pirates of the Caribbean: Curse of the Black Pearl
25. Shaun of the Dead
26. Lost in Translation
27-28. Batman Begins/Dark Knight
29. 8 Mile
30. The Woodsman
31. Let the Right One In
32. Finding Nemo
33. The 40 Year Old Virgin
34. Lars and the Real Girl
35. The Wrestler
36. Up in the Air
37. Confessions of a Dangerous Mind
38. The Royal Tenenbaums
39. Children of Men
40. Superbad
41. Up
42. Brokeback Mountain
43. Half Nelson
44. The Prestige
45. Before the Devil Knows You're Dead
46. Hellboy
47. Hot Fuzz
48. Knocked Up
49. Sweeney Todd: The Demon Barber of Fleet Street
50. Milk
*honorable mention: Freddy Got Fingered, O Brother Where Art Thou, A History of Violence, Snatch, School of Rock, Road to Perdition

1. 3:10 to Yuma
2. The Dark Knight
3. Kill Bill
4. Watchmen
5. Inglorious Basterds
6. Lord of the Rings
7. There Will Be Blood
8. Phantom of the Opera
9. Tropic Thunder
10. Sin City
11. District 9
12. Howl's Moving Castle
13. Pirates of the Caribbean
14. Finding Neverland
15. Walk the Line

1. Children Of Men
2. The Social Network
3. No Country For Old Men
4. The Departed
5. Crash

Crash is one of my least favorites lol.

least favorite acclaimed movies of the 00s:
1. Sideways (because "smart comedy" and "retrieve the wallet from the fat naked couple" dont mix)
2. Crash (because i thought someone was gonna get shot every scene)
3. Juno (because i hate words like "preggars")
4. Benjamin Button (because he makes the biggest decision of his life and is wrong about it)
5. Million Dollar Baby (because it just bores me)

12
Amelie
Tokyo Sonata
WALL-E
Encounters at the End of the World
Tiger and the Snow
The Island
Elegy of a Voyage

1. Yi Yi
2. In the Mood for Love
3. No Country For Old Men
4. A.I. Artificial Intelligence
5. Synecdoche New York
6. Mulholland Dr.
7. Miami Vice
8. Eternal Sunshine of the Spotless Mind
9. Pan’s Labyrinth
10. Inglourious Basterds
11. Werckmesiter Harmonies
12. Moolaadé
13. Gangs of New York
14. Talk to Her
15. The New World
16. Syndromes and a Century
17. Songs from the Second Floor
18. 25th Hour
19. The Prestige
20. Summer Hours
21. The White Ribbon
22. Wall•E
23. Kings and Queen
24. Half Nelson
25. Zodiac

I obviously like a whole lot but the very very best for me are

Frownland
Together
Wendy and Lucy
In the Mood For Love
Junebug
Old Joy
Encounters at the End of the World
Wah Do Dem
2046
Grizzly Man

spirited away
lord of the rings
in bruges
zoolaner
bourne trilogy
sunshine
28 days later
inglourious basterds
there will be blood
o brother, where art thou
american psycho
children of men
let the right one in
toy story 3
remember the titans

Glad to see some love for In Bruges.

1.) About Schmidt (Alexander Payne, 2002)
2.) The Lord of the Rings (Peter Jackson, 2001, 2002, 2003)
3.) The Incredibles (Brad Bird, 2004)
4.) Oldboy (Park Chan-wook, 2003)
5.) WALL-E (Andrew Stanton, 2008)
6.) Sin City (Robert Rodriguez, Frank Miller, Quentin Tarantino, 2005)
7.) Eternal Sunshine of the Spotless Mind (Michel Gondry, 2004)
8.) Sideways (Alexander Payne, 2004)
9.) Punch-Drunk Love (Paul Thomas Anderson, 2002)
10.) There Will Be Blood (Paul Thomas Anderson, 2007)
11.) The Dark Knight (Christopher Nolan, 2008)
12.) One Hour Photo (Mark Romanek, 2002)
13.) Star Wars Episode III: Revenge of the Sith (George Lucas, 2005)
14.) Lost in Translation (Sofia Coppola, 2003)
15.) King Kong (Peter Jackson, 2005)
16.) Up (Pete Docter, 2009)
17.) Spider-Man 2 (Sam Raimi, 2004)
18.) 21 Grams (Alejandro González Iñárritu, 2003)
19.) School of Rock (Richard Linklater, 2003)
20.) Super-Size Me (Morgan Spurlock, 2004)
21.) Spirited Away (Hayao Miyazaki, 2002)
22.) The Wrestler (Darren Aronofsky, 2008)
23.) Kill Bill (Quentin Tarantino, 2003, 2004)
24.) The Royal Tennenbaums (Wes Anderson, 2001)
25.) V for Vendetta (James McTeigue, 2006)

I think I'll later add some other unordered favorites and the movies I want to watch and rewatch.

1. The Fountain
2. Eternal Sunshine of the Spotless Mind
3. Pan’s Labyrinth
4. Children of Men
5. The Wrestler
6. Lost in Translation
7. Two Lovers
8. The Squid and the Whale
9. Crouching Tiger, Hidden Dragon
10. Moon

Fuuuck I forgot Oldboy.

Updated.