I've liked ABBA since I saw them on the Eurovision Song Contest, but I don't think I could choose a favourite track.
There are some I like more than others, but I can't think of any I don't like.
Back in the early eighties, a night out in the nightclub consisted of pogoing in scene2 to the Clash, Jam, Buzzcocks etc and then for the last hour going down to the main hall to knock some shapes out to Abba and the Nolans (for obvious reasons)