other than beer and weed, i generally don't buy things that i don't need. although i do find myself splurging on unnecessary toys more when i'm making a lot of money; i'm sure if i really had the money to spend i would have no problem spending it on pretty much anything.
Stuff becomes a burden if you have too much of it, and it can distract you from friends. Often times simple things like playing frisbee in the grass with friends is more enjoyable. .