Antonyms for the phrase "in poor taste" include "in good taste," "appropriate," and "tasteful." When something is said or done in poor taste, it is generally considered to be offensive or vulgar, whereas actions done in good taste are well-received and respected. If you want to avoid offending others or causing discomfort, it's important to be mindful of what you say or do, and to strive to act in a tasteful and appropriate manner. As a general rule, if you aren't sure if something is appropriate or in good taste, it's better to err on the side of caution and hold back.