Good thread Jonny,I've only just stumbled on it
I have been buying music since 1959 with money from my paper round

,so 5 favourites is a big ask.
But at a push I would pick these, then change my mind later
1 Comfortably Numb - Pink Floyd
2 Clocks (A white label dance remix not on general release) - Coldplay
3 Jesus to a Child - George Michael.
4 Insomnia - Faithless
5 Woman - John Lennon
I may even pick 5 more tomorrow
