If you don’t mind horror, I would definitely recommend SOMA. It’s also one of those games where it’s best to go in blind. If you are interested, do yourself a favour and do not look at any spoilers before playing.
Mapping with this app is a lot of fun! Sometimes I just go for a walk and open up StreetComplete to see if I can add some small contributions, like the opening hours of some nearby establishment or whether a given entity is still at the location.
You can also customize what kind of questions are shown so you can skip on things you may not like.
The only smart appliances I have ATM are smart light bulbs. These also partially contribute to saving energy (eg turn off lights when nobody is home / in the room), but even if that is not your priority, you can set up nice automations to soften the light as it becomes darker. I also use HA with Rhasspy to voice-control the lights.
As for fridge contents tracking, I wish there was a usable solution to what you describe. I have tried Grocy (can be integrated with HA), which looked nice, but I eventually stopped as it took a really long time to maintain. After each shopping, I had to input everything I bought (almost an hour usually). Then, each time you use something (eat a bun with some cheese, finish a bottle of milk, open a new sachet of some seasoning, etc), you must ‘consume’ it in Grocy. 99% of the time I forgot or was too lazy (once again, it just takes too much effort) and therefore the stock database was always out of date, making the whole thing useless.
Other things: I haven’t tried yet, but I also want to acquire some cheap sensors for temperature, and perhaps other things that I can’t think of right now. Maybe turn on the AC for a bit when it gets too warm (and somebody is in the room)?
If you don’t mind horror, I would definitely recommend SOMA. It’s also one of those games where it’s best to go in blind. If you are interested, do yourself a favour and do not look at any spoilers before playing.
Lots to think about.