One of the first games to be played by my child hands, and one that certainly left quite an impression:

Can't remember exactly how old I was when I got it, but my age was definitely not 17+, nor was it even two digits. Absolutely a blast. Also loved the first Turok as well as 3.

Another favorite, certainly more age-appropriate, would be:

Put countless hours into both Gold and Silver. So good. And naturally, I enjoyed the Stadium games for N64.

Rented this one week and it blew me away. Probably the first game I played with a "storyline", except maybe for Turok 3 but lol that doesn't count. The mashup of adventure, fighting and RPG gameplay was pretty cool. Came pretty close to beating it in the rental period, but there was a boss fight I just couldn't get past.

The first racing game I played and liked:

Surprising that today I'm more of a fan of realistic racing games, since I started off with such a silly and very unrealistic racing game. I didn't really enjoy the gameplay of it though, mostly just the silly tracks.

Then next-gen happened and I got an Xbox:

These two games came with my Xbox, and they were both fantastic. JSRF was just cool. The music, the cel-shaded graphics, the gameplay. It was the definition of awesome.

Sega GT 2002 is the first game to turn me on to more realistic racing games. The physics don't hold up to the likes of Forza or Gran Turismo, but the game was very fun and seemed extremely realistic at the time.

At the tender age of 12, I was sodomized by my first PS2 game, Silent Hill 2:

I think I can safely say that playing SH2 changed me. For the better, I think, but others might disagree. lol

And naturally, Silent Hill 3 and 4 were also loved.