As with everyone else here, I opened them as soon as I got them, dismissing that cardboard backing and plastic bubble to the bin like an offensive barrier that kept me from those goodies!!
But I did start another collection when I was around 14, friends from school who had long forgotten these gems would, at my request would hunt in the the darkest areas of their bedroom for them to bring to me for free. I also eagerly snapped them up for 50p a time at the shops and the local market stalls
I opened them however and displayed them on a shelf in my room. As time went by I discovered girls and beer ect ect, and my Dad eventually gave them all away!!!