What Do You Collect?

John and I are starting a couple new collector series pendants. We have been brainstorming and have a couple Fabulous, if I do say so myself, ideas for some different images that would fit into different series, all focusing on the "collector". Collectors are special people, they have a passion for the thing they collect and each individual component or piece of the collection is loved and valued as much as the collection is as a whole. Now certain collectors we will have a hard time with, for example...baseball card collectors, hard to do pendants of baseball cards, yet it is not Impossible for us to do a image of a particular baseball player or even better a certain Teams colors, initials or something along those lines. I do know certain collectors we already have plans for, I know several people who collect all things owl and I had a sale of a crocheted hippo on eBay a few years back that was bought by a sweet woman who had a hippo collection, and a huge one at that. That woman was so thrilled by the addition of my hippo ( who was too cute, wearing a bikini. No joke, here is pic to prove it) that she traced down my number via my return address on package and called me at home. I was really touched. While talking she proceeded to tell me of another woman who usually outbid her on eBay for hippos due to her collection and of her other friend who collected rhinos and was cataloging her collection to make The Guinness Book of World Records. Collectors of certain objects are like lovers of objects, and let me elaborate before you r mind goes to wondering, by lovers I mean, Dolphin Lovers, Dog Lovers, Rose Lovers, Coffee Lovers.... you get the drift. I mean the possibilities are endless... I know some pendants would probably get ridiculous, like Drew, aka Ben Spark, he collects Transformers - take a peek if you think I mean he just has a few...here is his post Photo-A-Day #803 on his blog and that was in 2007 SO sure his collection has grown, I wonder if he would Rock a Transformer pendant, ha, I chuckle as I write it because knowing him, he might just do it... ok so better example needed. My Aunt Marion collects salt and pepper shakers... do not think there is a market of salt and pepper pendants- not with a image of a sale and pepper shaker. Yes there is probably that one soul out there who would, and they will probably be my first comment, kidding (I hope), but you get my point. Collectors are great in that come holiday or gift time you know what they like and it is almost a goal to find a special addition to their collection.
So I would love to get some feedback, here are my questions. What do you collect? What do you love- that would look good on a pendant?