Had to go with PS5.
It's easy for me because Sony's exclusives are exactly what I look for in gaming (the more narrative/single player focused games) and it doesn't look like its changing anytime soon, in fact the quality just seems to be going up, so props to Sony.
MS exclusives are not appealing in the slightest to me and the way they handle business is just... weird. I don't feel like purchasing their stuff because I don't feel conected to them as a consumer, If that makes any sense.
Nintendo consoles are always somewhat appealing to me due to how unique they always are and how the quality of the software is always there no matter what, but considering a new one is probably far away it doesn't make much sense to vote for it.
Stadia is just whatever to me right now, as interesting as the streaming idea seems to be, I would rather wait to see if their vision actually comes true.