Don't really collect them per se, but I do have a flight jacket somewhere done up as if it were from a member of the US Navy's Jolly Rogers fighter squadron, when they were still VF-84 aboard the USS Nimitz (as opposed to being VF-103 now).
Then I heard the voice of the Lord saying, "Whom shall I send? And who will go for us?" And I said, "Here am I. Send me!" -- Isaiah 6:8