Hmm... Not sure if it's because I love the Naughty Dog franchise or the character himself, but I'll go with Crash Bandicoot.
The reason is Crash is what got me hooked on video games. The PlayStation was the first console I purchased with my own money (after years of saving up allowances), and at the time I was researching between the Saturn or PS. Then I went to a friend's house and he had a demo disc with Crash 2 on it. We played it for hours--the same level. That's when I decided I'd go with Sony's console.
Got Crash 2 the day I bought the console, but didn't even know I needed a memory card. So, while saving up allowance money for that, I would play the game as high as I can get without saving. Never did 100% it, but I did fully complete Crash 3 and CTR--to date the only games I've beaten with everything obtained.
Eventually I rented games and became hooked on Final Fantasy as well (FFX is my all-time favorite game, btw, in case anyone cares).
Since then, I've gotten all of Sony's consoles save for the PS4, but if we ever get a new Crash by Naughty Dog you bet your buttons I'm getting one.
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