Definitly the PS3 which I probably bought (including digital) something stupid like 200-300 games.
However thats a miss leading answer as when the PS1 was around (which would probably be a close second, though most were bootleg) and the PS2 was around my financial situation was no where near as healthy, in fact during the PS2 and first couple of years of PS3 I was paying to an IVA due to insurmountable debts. But I completed that 3 years ago which meant I could afford to buy as many games as I wanted.
Going back to pre-PS1 I was at school and couldnt even afford to buy my own console.
If my financial position remains as it for the next 8 years or so I can easily imagine my PS4 taking over the PS3. Its already at 20+ games.
The best way to find out if you can trust somebody is to trust them.
Ernest Hemmingway







