Take a fancy to somebody/something
Definition 1 of 1
Pro Tip 1/3Temporary Interest
The phrase often suggests a fleeting attraction that might not last long. 
She took a fancy to surfing during vacation, but quickly lost interest later.
Pro Tip 2/3Sudden Attraction
It highlights the spontaneous nature of the attraction, without previous intention. 
Out of nowhere, he took a fancy to oil painting.
Pro Tip 3/3Whimsical Choice
The phrase can be used to describe a choice made on a whim, rather than a deep-seated preference. 
On her walk home, she took a fancy to a stray kitten and decided to keep it.