I've heard some people say that the Joker is overused, but honestly, he's one of my favorite characters. I like him about as much as Batman, and I'd be okay with it if they gave Joker his own long-running Elseworlds series. The only thing I hate is when the character isn't written well and the stories featuring him aren't good. It's like the difference between Jared Leto's Joker and Heath Ledger's or Mark Hamill's Joker. If it's a good take, I usually want to read more stories with the character. Elseworlds tend to give the characters more depth and the stories are more creative because they are not in the main continuity, so I prefer them to whatever is going on in the main series, usually.
What's your opinion? Is the Joker overused or do you want to see even more of the character?