I deliberately kept mine bizarrely limited: pins of Jules Verne-related movies and rides (e.g.: 20,000 Leagues Under the Sea, Journey to the Center of the Earth, etc.) but with either a Disney character (e.g.: Mickey, Donald) or the attraction logo. It's been so effective that I haven't bought a new Disney pin in about 5 years 😀 I also have a "diorama" lanyard of aquatic characters (20,000 Leagues, Little Mermaid, etc.) and my typical souvenir collection of parks and places I've been to.
I have been tempted by Lounge Fly's Fantasia pins to try starting up that failed collection again, but I haven't decided if I really want to spend the money.