Gabriel from Constantine is the oldest costume I have which still occasionally gets wear. I even managed to wear it twice this past summer - once for a photo shoot at Guildwood Park with Elemental and Yavarice, and again shortly after at ConBravo! I love how the shots from the park came out and my only (small) regret is that I didn't have my new hospital bracelets made in time to wear. They looked great when I did finish them though, and you can see them in the ConBravo! photos. Check out the Constantine gallery for lots of pretties.
(Below is a behind-the-scenes pic that Yavarice took, and the final photo from Elemental XD)