There's nothing quite like a good riddle. They work out your brain muscles, and when you're good at them, they're a lot of fun to stump your friends with. Being able to solve one without any extra help is a great ego boost.
Here are a few great examples to begin (or rekindle) your love of riddles.
Image - Thomas Tolkien
Ahh, these are so good. I'll certainly be using these at the next party I go to. They're a great way to break the ice (or just frustrate all of the guests).