Simple:
* My aunt is a bit eccentric, always wearing mismatched shoes.
* The old mansion had an eccentric design, with a tower that seemed to lean precariously.
* The eccentric artist painted his subjects in vibrant, unnatural colors.
More complex:
* The eccentric billionaire's philanthropic endeavors were as unusual as his personal life.
* Her eccentric fashion sense often drew curious stares and whispers from passersby.
* The eccentric inventor's workshop was a chaotic jumble of gadgets and unfinished projects.
Figurative:
* His eccentric behavior was a constant source of amusement for his friends.
* The eccentric path the river took through the valley created a picturesque landscape.
Remember: "Eccentric" often suggests a personality quirk or unusual behavior that is out of the ordinary, but not necessarily negative. It's important to choose words that accurately reflect the intended meaning.