It expresses a sense of consistency in personal preferences and a belief that one's tastes are enduring and unchanging.
Here's a breakdown:
* Nuestro: Our (masculine plural possessive pronoun)
* Buen: Good
* Gusto: Taste
* No: Not
* Cambia: Changes
The phrase suggests that the speaker and those included in "nuestro" have a strong sense of what they like and that their taste is not swayed by trends or other influences.