About a year ago I got turned on to collecting vintage and antique postcards of my hometown, which is steeped in history. I get a particular kick out of seeing old postcards of buildings I'm intimately familiar with -- (I've eaten there, I've worked there, I've shopped there) -- with horse-and-buggies or Model-T's parked out front. Reminds me that this town had a significant and interesting history long before I showed up.
The danger of this hobby is that, there is so much out there that, you could get sucked in and, next thing you know, your house is chock full, floor-to-ceiling, front-to-back, side-to-side, wall-to-wall, with postcards. And so, you must specialize. And so far, I've been good at keeping it to just a shoebox full of a few towns that I'm very familiar with -- the town where I was born, town where I grew up, town where I went to college, town where my ancestors hailed from.
But yesterday, I discovered that there's another nitch I may get sucked into, which is vintage knitting postcards.
So, I'm thinking I may need to get a bigger house! ;-)