grower
n. countablen. something or someone that you do not like at first, but you start to like more as you spend time with them. It is often used to talk about music or people that take time to appreciate.
n. a person or thing that initially fails to impress but gradually gains one's appreciation or affection over time. Frequently applied to creative works like albums or films.
I didn't like the song at first, but it's a real grower.
The new lead singer was a grower; fans were skeptical at first but loved him by the tour's end.
While the film's slow pacing initially alienated test audiences, it proved to be a grower, eventually achieving cult status as viewers discovered the subtle layers of the script upon repeat viewings.
Typically used with the indefinite article 'a' in the predicate of a sentence.