Starting off with perhaps THE power ballad of all times, "Every Rose Has Its Thorn" by Poison:
Written by front man Bret Michaels in an LA laundry on the occasion of his stripper girlfriend cheating on him and subsequently leaving him. Despite javing played this one a gajillion times myself, I never seem to tire of it. Check out the fierce slo-mo b&w images of the band in the video. Epic example of music video by mixing a concept, live shots and "candid" band images.