For example, I once decided that I needed to buy beds for every single Sylvanian family I had (I also collected Sylvanian Families) so saved up all my pocket money and over the course of several years succeeded! Only now I am left with stacks of dolls house beds which are just collecting dust. But I will hang on to them; if I ever have children, who have the same irrational desire, they wont be wasted!
When one discusses collecting things, stamps are often cited as a classic item, and invariably sneered at as a hobby. I collect stamps in a way, not rigorously, but will keep a stamp if an envelope has a design which is not the queen's head. No offence intended to her Majesty, but I have rather a lot of those! This started when a friend made me a box with stamps inside it (over ten years ago) and I saw them in a new light!
The Peter Rabbit stamp that was in the box remains my favourite!
I am also a bit of a hoarder of might-one-day-possibly-be useful-maybe things. Like train tickets, which I have kept from the past year of commuting into