Wanna really piss people off? Drive the speed limit in the left on the highway in Chicago.
I used to collect coins and foreign currency. Growing up, my grandparents traveled a lot. They sent me coins and bills from Europe, China, the middle East, Australia, everywhere. I have them somewhere. I have a collection of hand painted revolutionary war lead soldiers my other grandfather gave growing up. I have most of the famous guys, including George Washington on a horse.
I also love a/v stuff, and was good at installing. My home system is older, but incredible. 7.1 system, different brands. Currently in storage, but the storage pod gets delivered Saturday!
My dad has one of those Definitive home theater in a box speaker sets, which is ok. I got him hooked up with an Onkyo receiver that's perfect for his little 5.1 set up. A couple months ago I set up a new Audio/Technica turntable for him. He has a nice lp collection.
I have other cool collectibles, but mostly stuff people gave, that I'm really into.