PC. Used to be both but sense consoles are gatekeep and forced on what I can and can't do and the whole bullshit there doing there just going to get worse.
I prefer steam machine for my games. Sense I can do whatever I want with it without fear it will suddenly change.
Steam could turn to do things the console company are doing but sense the steam machine is basically a small form Factor PC they can't just update it and lock things out.