Some stuff I actually found interesting and didn't delete:
-- Zelda TP - great all around
-- DOA4 - Tecmo trailers are always fun
-- RE4 PS2 (primarily for seeing the little bits of new cutscene, game itself looks better on GC)
-- Kameo onfloor demo (not an official trailer, and maybe even better for it)
-- Onimusha 4
-- Final Fight Streetwise (fugly, but gameplay might be good and I can't pretend I don't want to see how things pan out with the Cody brothers storyline)
-- Ninja Gaiden Black
-- Gears of War (both canned trailer and gameplay demo)
-- PGR3 (out of excitement for series, trailer content indeterminate)
-- MGS4
Edit: added MGS4 for its humor, forgot about it