But seriously, probably the PS2. Mainly because it's the only console I got as a kid and also because it's the last console before games and consoles started wanting to phone home over the Internet. I have PS3 games that I'm pretty sure are permanently hampered or unplayable because their servers are offline, but I feel confident I can still boot any PS2 game I own and play it without issues.
If forced to choose one retro console forever what would you choose and why?