The noun 爱好 (àihào) means "hobby" or "interest" and refers to activities a person enjoys doing in their leisure time. It can also function as a verb meaning "to be fond of," and the person who has the hobby can be called an 爱好者 (enthusiast or hobbyist).
我的爱好是摄影和爬山。
wǒ de àihào shì shèyǐng hé páshān.
My hobbies are photography and hiking.
你平时有什么爱好?
nǐ píngshí yǒu shénme àihào?
What hobbies do you usually have?
他的爱好很广泛,画画、游泳、下棋都喜欢。
tā de àihào hěn guǎngfàn, huàhuà, yóuyǒng, xiàqí dōu xǐhuān.
His hobbies are very wide-ranging — he likes painting, swimming, and playing chess.