I take a very different approach to home automation than most, anything I install has to be fully usable by others. As such, some of my choices are a bit boring.
Nearly every single light in the house is a Philips Hue lamp or has a Hue bulb, including two Hue Phoenix ceiling lights downstairs. It’s a part of the system that’s been built up over time as bulbs have been on various sales at Amazon. The only downside is that we’re still on the first generation bridge.
The great thing about Philips Hue is that you can still use physical switches, either native ZigBee Light Link ones or a double-toggle of the in-wall ones. One of the things we ran in to on the first install was the issue of pulling your phone out constantly to turn lights on and off (this was before Alexa/Hue Tap/etc.).
While I do have Google Home and Alexa in the same room, they’ve effectively become voice light switches and Cast speakers. As much as I love them, they haven’t really found their place yet.
AV-wise, I keep things incredibly simple so there’s no need for me to own a Harmony remote/hub, I picked components carefully so that the only remote I use upstairs is the Apple TV’s Siri remote, that sits nicely in a Studio Neat Apple TV Remote Stand.
Downstairs, it’s just a NowTV Smart Box as a Freeview and iPlayer device (it was REALLY cheap when I bought it after the Freeview tuner inside the TV died) along with a Chromecast for anything else.
All content comes from a huge chain that ends with Plex running both out on a VPS slice and internally on my PC. Generally, I use the tvOS client for video and the Chromecast client for anything else around the house, including music. That’s all my library though, everybody else gets things from other sources.
Nest stuff has been incredible, the friendliness of Nest Protect and the Thermostat really helps with the acceptance factor. This is how smart home stuff should be.
As much as I love HomeKit on paper, it’s been a real wreck in the real world. It’s just not good enough to deploy here.
Networking is an area I’m currently in the process of reworking. It’s frustrating that I need something more than Google Wifi but don’t have the political/financial push to get something as big as a UniFi system installed outside the lab rack. The Synology Router RT2600ac is my current front-runner to replace the more than eight year-old Apple Time Capsule. My NAS is just a Synology DS414j. My only regret there is not going for a bigger unit!