My ex-girlfriend is INFP and a hoarder (you can hardly walk around in her house). My downstairs neighbor (ENFP) hoards coffee creamer and continually asks us (her neighbors) for coffee creamer daily. I'm odd because I throw things away because I want my apartment to look like a hotel room. I haven't read of a connection between inferior or tertiary Si and hoarding. I wonder if anyone knows which function or types are most likely to hoard.