5. Green Lantern (Green Lantern)
Hal Jordan, The Green Lantern, has a unique costume as far as this list is concerned because his is generated by the force of his own willpower when he opts to activate his green power ring. The result is a cool little face mask (which fails epically at concealing his identity) and a skin-tight, but very awesome looking bodysuit with the Green Lantern logo on the front it of. When Hal's friend and co-worker Thomas Kalmaku comes over to Hal's place in the movie, Hal gives him a demonstration of the transformation and the ensuing short conversation says it all:
Hal Jordan: Now, pay attention...
Thomas Kalmaku: Whoa, green!
Hal Jordan: I know, right?!