I've had 3 consoles that I primarily had vertical:
Xbox 360 (don't have out anymore)
Wii (loved its angled stand, but don't have one out anymore)
Wii U (still have it out, but might switch to horizontal for space reasons)
Switch (when docked, but I only use that for charging)
Horizontal:
XB1 (just looks right that way to me)
PS3 Super slim (easier to get discs in and out)
PS4 Slim (not even sure if its made to go vertical)
PS2 & PS2 Slim
And all the ones that are made that way (N64, OG Xbox, Gamecube but I guess that one is in-between vertical and horizontal, haha).
If I get a PS5 and if my shelves are wide enough, I will have it set horizontal, like how it looks that way.
Man, the PS5 looks so
weird horizontally. I mean, it looks weird vertically too, but horizontally it looks like it's melting. I'm not sure how I'm going to orient it.
I kinda love it that way. The asymmetry of it is really wild.