Xbox 360 for sure, followed by the original. Those were the only two that felt like they had a "soul" to me. I've never owned an Xbox but I almost bought a 360 after I played Bioshock. I passed though because I knew already that it was coming to the PS3, which I was getting eventually.
The Xbox One really turned me of to the brand I think and there's just nothing that excites me about Xbox Series; Starfield and Hellblade 2 were busts, so we'll have to see if Perfect Dark can deliver on how amazing that trailer made it look. And perhaps Sony's Astro Bot will encourage Microsoft/Rare to do something awesome with Banjo? Here's hoping.