Hoarding....
I'd hoard more but with even as little stuff as I have compared to some of you guys, moving SUCKS. Can't say for sure if I'll still be in the same house in the next 3-5 years since I work for a large corporation and these days the likelihood of getting legit raises and promotions staying in the same place is slim. The thought of acquiring more parts gives me anxiety thinking about having to move them all.