I actually only own the Megahouse Izanagi statue (he's chilling on my work desk) but have been tempted a few times by either a D-Arts figure or a Nendo though I still haven't bought any. I do plan on picking up the Narukami Figma though.
Most of my weird Persona collection stems from mostly keychains from cons. Myself, fellow GAF member red_taiyaki, and another friend of ours basically pick out blind box keychains (usually Persona 4, but P3 if it's available) at cons and whoever gets Teddie is the "loser" (for P3, we considered Ken to be the "loser" prize).