Mostly of the famous/semi-famous variety. I myself am not one most people take for being a toy collector. It's probably the most normal thing about me.
I'm not alone. It's well known that Glenn Danzig is a toy collector.
One of the most impressive and jaw-dropping toy collections I've seen lately belongs to Tesco Vee, who is just as well known for being the absolute lunatic frontman of The Meatmen as he is known in toy collecting circles.