Stamp collecting is a very interesting and complex hobby. It can be just a child hood collection of saving stamps that come from foreign countries.
It is odd to look at a small bit of paper and then realize that it has traveled many thousand of miles. Who sent it to who, what tales could it tell if it could talk.
People who fall in love with stamps usually begin to specialize. This can be a topical collection of stamps of the same theme. some people collect stamps with horses on them, some collect birds others collect historical figures.
As a person progresses in stamp collecting they discover much about the culture and languages of people of other nations. You soon discover that you need to develop a rudimentary education in Languages just to identify what country it is from. How can you tell if a stamp is from China or Japan. What is the difference between stamps from Hejaz and from Tanna Tuva. Where on Earth is Carptho-Ukraine?
Philately soon becomes an educational process in geography, culture and languages. Then at some point you discover the subtle differences in cancellations and the stories they tell. You eventually learn the history of paper postage stamps and learn the first printed stamp was the One Penny black from GB and that the world's rarest stamp is the one penny, hand cancelled with clipped corners from New Guinea and you learn the History of how a young school boy was the first known owner of it and how it eventually became the most valuable stamp ever found.
Stamp collecting is much more than a shoe box full of little bits of paper, it is watching world history unfold through the eyes of the common person.
The stories they tell. Just the feel of the differences in the paper used. How the paper of stamps from Azerbaijan feel so different from the paper used for the stamps from San Marino. Then the oddity of the Gold Foil stamps from Tongo where at the time the gold foil was cheaper than paper.
My favorite Personal collection was my collection of Carptho-Ukraine stamps. I had an example of every Stamp type ever issued by the country. My pride a complete country Country Collection. Every stamp issued from Scott catalog # 1 to Scott catalog #1. The Country had only issued one stamp in the 12 or 14 hours it existed as a Country. The country ceased to exist before the stamp could ever be used to mail a letter.