That totally makes sense.
I kinda have a rule with dolls that I don't keep ones just because I think they're cute. There's too many. I have to have some other filters and parameters to what I keep. I really do have a hard time enjoying anything I have too much of. Smaller collections are just more manageable and if I start accumulating too much it gets overwhelming.
Saaaame. I feel so fickle sometimes, like I'm not really a collector at heart, but just like having some cute things, or just like building sets and sorting things.
Truthfully, I'm quite minimalist in many things and having large collections can start to give me anxiety. Though I'm not sure if you meant it in the exact same way, you saying 'panic purging' resonates with me.