Just counted mine recently since I re-paired half of my network to a new hub and wanted an estimate of how long it would take, assuming some amount of time per device. I have about 40 Z-Wave devices, 65 Zigbee devices, and a few LAN/cloud devices (Sonos, weather station, etc.). I’m not including my Hue Zigbee bulbs on a separate (Hue Bridge) network, though I suppose that adds around 25 more. I’m also not including devices that mostly work in their own world, separate from my “real” home automation — Wyze Cams, voice assistants (though I do have some things exposed to them), etc.; or my network gear, given that it’s really not for automation per se (though I’ve been converting to UniFi, too — finally got the WiFi 6 Pro AP, the biggest piece I was missing, replacing my old AirPort Extreme). It also doesn’t include things I have laying around unused, but does include a few devices of each protocol that are really more for testing than daily use.
This is all probably way more than I need, especially for the size of my house. 
(But it was all purchased over years, not all at once.)
I can’t pick one favorite device, but the Red Series Dimmer (LZW31-SN) is probably my favorite. I suspect the Blue Series will give it a run for its money up on release. The LED bar is great for status and “notifications.” But many of my Zigbee motion sensors would be a close second, along with the Hue bulbs — motion lighting was got me into this in the first place, and Hue is rock-solid and Zigbee sensors are quick, responsive, and generally have long battery life, making this all the more pleasant. Not sure what surprises me other than that I have my motion lighting set up so well for my needs that light switches in other people’s houses practically feel unbearably cave-man-esque…ha.