Rating is central to me.
I draw the line at 3.
3 or more means: part of my 'preselection'.
2, 5 means: I might change my opinion.
Everything less: will probably never listen to that again.
1, 5 or less: I could remove those (but don't do it)
5: perfection (not be listenened to too often, not to overkill it)
3 to 4, 5: great for all kinds of flows (background, dancing...)
And, I use 'love' for some temporary 'flashes'.