mine coming up later...

So far? I cannot rank them (yet), that would be too difficult.
King Kong
The Constant Gardener
Batman Begins
Pride & Prejudice
Howl's Moving Vastle
Junebug
The Sisterhood of the Traveling Pants
Capote
A History of Violence
Good Night and Good Luck
Cinderella Man (shush y'all! It was TOUCHING)

mine (not ranked):

Wedding Crashers
The 40 year-old Virgin
Star Wars Episode III: Revenge of the Sith
Harry Potter and the Goblet of Fire
Mr. and Mrs. Smith
Hitch
War of the Worlds
The Exorcism of Emily Rose
Saw II
Constantine

Yes, I'm a sucker for blockbusters, what can I say?

Well, I'm going to list some of the ones I saw for the first time as well, may not be 2005 releases...

In no paricular order:
Fantastic Four
Saw II
Mean Girls
Day After Tomorrow
Employee of the Month

Right now I can only come up with: I will add more soon.

1. Pride and Prejudice. (including the mini series made in 1995 by A&E and BBC production)
2. Shopgirl.
3. Star War III
4. Constantine.
5. The Island.
6. Mr. and Mrs. Smith.