I don't play games a lot anymore, I did when I was 10. I spend more time talking about games and making them then playing them.(not that I ever succeeded in making a decent game

).
I don't think video games have a really big impact on people, sure there are idiots who try to imitate GTA but normal people know not to act like them.
I don't really like making top tens because they will change every day. If I want to play a rpg game and have had enough of shooting games my number 1 on the list will be a rpg. That's why I'll just name some games that I enjoyed playing a lot:
Suikoden 2: IMO the best rpg ever made.
Tombi/Tomba 1&2: the best 2D platformer I ever played, the graphics are a bit childish but it suits the game.
Age of empires (age of kings and expansion pack): I think the newer age of empire series are more fun but this game got me into rts games and is worth naming.
FF7: It doesn't deserve all the praise it gets but I still think it is a great game
Monster hunter: A great game, it was my first online game.
Monster rancher (monster rancher 2 in europe): A pokemon kind of game. But I enjoyed this game much more then all the pokemon games
Little big adventure 1&2: Great game, I've replayed this game a lot.
Suikoden tactics: My first srpg, I loved it.
GTA san andreas: A great shooter. I don't really like this genre but the gta series are great fun.
Black and white: One of the best sandbox games of its time.
Harvest moon: Another fun game
And then there are games I enjoyed playing when I was young, but are boring now, like roller coaster, sims, crash bandicoot and tekken.