Relatedly, it took me a while to pick up on the fact that "non-profit" does not necessarily equate to "beneficial for society". Many non-profits out there have noble purported goals, but when you actually gain some experience at them you start to realize that they are vanity projects for the wealthy.

[edit]: To clarify, I'm not making the claim that all non-profits are vanity projects, just that there are many out there that are. If you ever do want to work in the non-profit sector, doing some due diligence before applying for a job is a must (I recommend obtaining the publicly reported financial records for a non-profit in Form 990; what a non-profit's founder pays him/herself relative to the average employee speaks volumes about their moral character).