My parents are married for 25 years now, and they still call each other pet names, I just find it super sweet! thoughts on pet names? for it or not?

I would say it's commonly sweet if you have terms of endearment with your spouse as it describes your affection for each other. Most of the couples I know have been using their terms of endearment way back when they were still boyfriend/girlfriend until they got used to calling each other by these names through the years. However, for some couples, their endearment changes as time goes by depending on their intimacy through time.