Right now I'd choose Lemmy. Summit on mobile and photon on desktop.
Piefed is a close second, but still has a ways to go. Honestly, I could see it surpassing Lemmy soon.
I haven't driven Mbin too much, but it's pretty neat conceptually. I wouldn't count it out if you want to be able to microblog from the same platform. Kind of novel, but I found the experience to be disconjointed overall.
I know I'm in the minority here, but I really didn't like the nemesis system at all. Just like roguelikes, the infinite repeatability of it was a turn off for me and made it feel pointless. I'd much rather play a hand-crafted, limited, curated experience that actually feels meaningful. These generative systems just feel lifeless and pointless to me.
Oh, nice fit! Are you pretty satisfied with it so far? I don't imagine it would have any issues with the cold temps, and it pretty much looks like it came with the fridge. Good work!
This is pretty cool, and I still want one, but what I really want is this form factor with steam os or bazzite.