Earlier quoted context omitted.
The single greatest feature of Echo that I use, (and too few others use) is turning on my Phillips Hue lights. You can give each individual light a name, as well as groups of lights their own name. Very convenient to turn on / off lights from anywhere in range of the mic. I use it everyday multiple times a day. If anyone finds network connected lights useful, then they'll find controlling them through Echo doubly use…
Not to pick on you :-), but I have these things called light switches in my house that work pretty well for turning on and off lights. I confess to not seeing much attraction to smart lightbulbs with names. (To be fair, if I had a lot of lights not connected to switches as was the case when I moved into my current house, I'd probably have put in smart lightbulbs rather than doing as much rewiring as I did.)
Or right before going to sleep, you remember you left the living room light on, so you say, "Alexa, turn off the living room light", and watch as the glow under the door disappears.
It's a luxury, but it's a lot of fun if you are lazy.
I also use the Echo to adjust my nest thermostat, control my entire home theater (with 6 different devices), and control my tempurpedic adjustable bed and even remote start my car.
I find the possibilities of voice control and home automation to be intoxicating, and hacking around with the Echo is sort of one of my hobbies right now.