Well I am a supporter of Nintendo handhelds and Microsoft consoles so naturally I would pick Sony but there is a reason.
With the PS1, it choked the life and potential out of the Sega Saturn and N64. The PS2 did this even worse, creating a monopoly that made it near impossible for competition to thrive. Sega quit. Nintendo was forced to take a drastic route and go the Wii route. Microsoft was convinced that the only way to avoid a repeat was to launch before the PS3, even if the hardware wasn't ready.
I am a firm believer in Sony killing competition. Only with Nintendo and Microsoft taking drastic actions this gen has caused Sony to drop to last place and actually create balance and equal potential/room to grow in the industry.
On top of that, Sony has no flagship franchises on the level of Mario and Halo. Come to think of it Sony has no mascot, just a bunch of diverse (yet lacking in any meaningful sales) exclusive IPs.
Nintendo rules the casual console market and the handheld one. Microsoft rules the core console market. PC gamers still get their PCs.
Xbox: Best hardware, Game Pass best value, best BC, more 1st party genres and multiplayer titles.
