Another one here whose ds has an eclectic mix of objet d'art
on his bedside cupboard. We have, special sweet wrappers, sticks, stones, pine cones, acorns, bits of string, lumps of blu-tac, price tags, gift tags ...... the list goes on.
He also mourns the loss of every single dead insect he ever sees and gets into scrapes at school defending insects from other pupils. (That one came back to bit him on the bum quite literally after he spent a fortnight defending a puddle full of strange wormy things, that turned out to be midge larvae.
)
He doesn't have an attachment to shoes per se, but lord help me if I dare to chuck any of his old pj, tshirts or worse ... fleeces.
When it comes to toys and other belongings ... well, let's just say our 'loft' has elastic sides.
We even have huge items of much loved furniture up there ..... apparently. 
We had a major meltdown in the summer holidays because his baby food bowl, that he has always insisted on having his porridge in, split. No chance of getting another, seeing as it was actually bought for my niece to visit us when she was weaning - and she's nearly 23 now. We have reached a compromise in that, he will have his porridge in another bowl - if - we will keep the bowl for him to put his crisps and sweets in on treat days. He still insists his porridge doesn't taste the same though.