Thanks for putting it in words, Amos! Smooth, easy phrase or not, the feeling it supposedly connotes is a valid one. (And that resonates with me. :>)

If I can judge others by my own experience, when we use a word or phrase like that it is usually because we are searching for a true description of what we are feeling or planning.

I don't tend to say "quality time" but I know what I'd mean by it if I did use it. I would mean a period of time when our attention was attuned to each other, i.e., we didn't go shopping or bowling or whatever; maybe we didn't even make music together. To me it means a time of connection, of being in the moment- another phrase that is over-used and therefore suspect.

I do use 'resonate', only because to me it describes a feeling that is internalized, a feeling that is almost physical, a 'knowing' that is true and deep and honest.