I play when I can, especially adventure games (yes, they still make them), but luckily there's not just one genre I find time passable with. What truly strikes me in a game is its storytelling. Be that superb enough and all its remaining qualities fall somewhere into the background. Or at least I'm willing to forgive a lot of issues.
Top lists, why did it have to be top lists...
1. Indiana Jones and the Fate of Atlantis
The obvious no. 1 for me. Still the only truly succesful attempt to bring the man in the hat into a medium outside the silver screen.
2. Deus Ex
Replaybility value... somewhere in the clouds. How come they still haven't managed to make a game like this up to this day where your decisions really matter?
3. Fallout 2
Again, story and replayability. Worth revisiting over and over again.
4. Broken Sword: the Shadow of the Templars
George is one of the most sympathetic video game characters up to date. The rest of the games in this series are not as good as the first, but truly enjoyable as well, mostly thanks to their excellent protagonist. A virtual fella who truly makes you feel you've run into an old friend every time you see him.
5. Mafia
Shadowed bit by GTA III and unworthily compared to it, since it was never meant to be a free-roamer in the first place, but simply an interactive storytelling device. It's like a movie. Except, you get a good enough game in the same package.
Few series earn honorable mentions:
Half-Life and its sequels. Very immersive FPS experience.
Max Payne. Both parts are pretty escapist fun. Full of clichés and they do get a bit repetitive after a while, but still, fun.
Monkey Island series. Guess they are a must to mention for any adventure game buff.
Hitman from part 2 onwards, Splinter Cell up to part 3, Thief series. Stealth is fun! Be it the social kind or more traditional stick-to-the-shadows.
Knights of the Old Republic. Pretty immersive for a Star Wars game. And yet again, has some replayability. Despite the fact I seem to have difficulties going other route than LS...
And oh yeah, there's no better control scheme than mouse & keyboard, no matter the game. Pads, nunchakas and whatever there are... they're for sissies.