I have lots of stuff. But, generally unlike other females, I tend to stop wanting more stuff once I have what I want.
For example: I wanted a nice hair straightener (b/c I am inept to do my hair nicely for more formal occasions and my hair can get pretty untame in its waviness), a nice winter coat (so I don't wear my red one that's fit for outdoor sports to a funeral, for example), etc.
I have acquired these things and actually stop wanting unlike most other females.
So, I am not minimalist in the sense that I want a base of things, but once I have them, I don't desire more like most people.
I also have a severe need to overpack "just in case". Especially on canoe trips. I would rather haul 10 extra lbs of gear than stress about not having an extra tarp and extra day's food on top of the normal extra day's food. This seems to be a trend of Ni overactive imagination.
The most immaterial guy I know is my INFP friend. He's the last of 9 kids, I suppose he learned to deal with what was there and not worry. He packs for a canoe trip in 10 minutes and if he can't find something important, tends not to worry and is confident things will be okay regardless. <shudder>
He also lasted an entire summer (April-end of August) spending $42 on groceries b/c he planted a garden and ate leftovers from his work's regular conventions. Talented guy, he is.