tickle (one's) fancy
To be appealing or pleasant to someone; to be intriguing or of interest to someone. A: "Do you want to go to a movie later on?" B: "I don't know, there's nothing that really tickles my fancy in theaters right now." I'm not going to declare my major until I've had a couple years in college to see what ends up tickling my fancy.
tickle someone's fancy
to interest someone; to make someone curious. I have an interesting problem here that I think will tickle your fancy. This doesn't tickle my fancy at all. This is dull and boring.