Just picked up a Steam Deck, haven't owned a handhold system of any type since the OG game boy.
What is good to know about this thing? Any particular kind of games run well on it vs any kind run like crap?
Can you put emulators on it or is it pretty much locked to steam compatible games?
Are the controls and response times good enough for 'twitchy' games or more just stardew valley type stuff?
Doing basic searches shows all sorts of conflicting results so I'm hoping someone in here has one.
In addition to what everyone else mentioned, you can also run a lot of native Windows apps, too.
For instance, there is a guide to run Star Citizen on the Steam Deck. If you optimise the settings you can get about 20fps in the cities, and around 50 fps in space:
But yeah, EmuDeck is a must-have, as it's easy to install and gives you access to every important emulator out there.
Also, a few noteworthy games to get on the Steam Deck with native support: