You may need to try something multiple times to start enjoying it, as with 'an acquired taste.' Olives can be an acquired taste; they might grow on you over time.
Pro Tip 2/3
Subjective Experience
'An acquired taste' often varies from person to person, depending on their personal experiences. For some, classical music is an acquired taste.
Pro Tip 3/3
Initial Discomfort
The phrase implies that the first impression isn't always positive, but perceptions change. Sushi was an acquired taste for me; I didn't like it at first.