Dancing Queen is, IMO, one of the best records ever! I also love Eagle, and One Man One Woman, Why Did It Have to be Me, and just about everything else they recorded................
I remember working late once, about 20 years ago - before Abba were cool again - and listening to them thinking no-one else was there to know I was an Abba fan! I was caught out though!
I also love the film Muriel's Wedding - brings the songs to life wonderfully, and I love the dance to Waterloo, absolutely classic film moment! I PMSL every time I see it!