Between 3 switches, 4 servers, and my desktop also using one of my UPS units, I average about 850w, with peaks up to 1.1kw when my desktop is running. Luckily, electricity where I live is only 13cents/kwh.
I'm not saying that cost of power is entirely irrelevant.
I'm saying that "My setup consumes a lot of power, but that's fine because it doesn't cost me much" is kind of backwards.
While monetary cost certainly is one of the arguments for energy efficiency, responsibly using resources and avoiding wasting energy are way more compelling ones imo. That especially applies if your energy isn't produced via renewable means.
Even if power was entirely free of monetary cost, you shouldn't waste it, don't you agree?