Despite his attempts not to appear to be a geek, Leonard owns, among other things, Star Wars hygiene products, a prop of the One Ring, Star Trek and Star Trek: The Next Generation officers' uniforms, an expansive Superman comic book collection and a Battlestar Galactica Colonial warrior's flight suit. Early in the series, Leonard tried to get rid of his collectables to impress Penny with his maturity. However, he changed his mind when he saw that Penny was already dating another man.