So the biggest problem with Indigo and the wide array of available plugins is that I pretty much feel the need to automate everything, if it needs it or not. (The availability of a plugin or at least available API has influenced multiple major purchase decisions).
Most recently, my wife bought some of these flameless LED candles for the living room coffee table. They're battery powered and come with a junky little IR remote to turn them on and off.
We've become so accustomed to hitting 'All-Off' at night and everything actually shutting off, that I've woken up a couple of mornings this week and found the candles still on. Well... the TV stand in the living room already has a Global Cache IP2IR in it that Indigo uses to Automate some AV equipment via Cynical Cache. I pulled out an IR blaster, mounted it discretely enough on the side of a photo frame aimed out towards the coffee table, and now I'm controlling a $25 set of battery-operated candles via Indigo (and now I'm sure they're off at night too!).
Not only that, but with the Hue Bridge plugin, my kids love using the Echo to turn the candles on and off.