For my OC Eureka... part of his character is that he's a constant idea generator, in search of an idea that would make him rich. I was thinking it could be kind of funny and almost ironic that he'd regularly have ideas for highly successful pre-existing inventions in our universe, e.g. a large network of record players that could deliver news and play music all at the same time... i.e. the radio in our universe. But his big character flaw is that something usually comes up that causes him to either forget it, or to think it's a silly idea and not pursue it further.