My SteamID is Iaredios, and I have about 70-some odd purchases on Steam. Some insight into your interests might help in game recommending, but I can share some of mine that you might take interest in.

The Travels of Marco Polo is an atmospheric click-based adventure/puzzle game, but as it is based on a historical person and his supposed life, it is pretty linear.

Team Fortress 2 is a good free FPS game, silly and is based around team work (if the name didn't give anything away).

Banished is an eerily beautiful RTS game where you have to keep your settlers alive, most of the time you will see them rot away from the elements or hunger so there is replayability. Music is relaxing.

Valiant Hearts: The Great War is a beautiful historical side-scroller with a heartwarming narrator and realistic characters as they go through World War 1 (though some implausible stuff happens because it is a video game).

Oddworld: Abe's Oddysee is a classic side-scroller with both tension, beauty, darkness, and dark comedy. Set on a far away planet of Oddworld, the corporate businessmen and investors of Rupture Farms have driven an animal the used to extinction and the two others they use are now endangered, so to save the company the CEO plans to use his own 'employees' as the new meat-source. Horrified, the janitor Abe sets out to free as many of his enslaved people as he can.

Serious Sam Classic: The First Encounter. Want to play an old arcade-style FPS game with barely any story and only exists so that you can have a muscular guy from the future fight monsters and aliens in insane combat set in bronze-age Ancient Egypt? Well, here you go. It won't hold your hand, so prepare to be spraying all of your ammo and dread the sound of the AAAAAAAAAAAAAHHHHHHHHHHHHHHH!!

FTL: Faster Than Light. This indie game is simple yet addictive, and appoints you as the captain of a spaceship that has to outrun a large rebel fleet as you try to get to the capital sector, all the while having space fights and adventures along the way. You will die, A LOT, but it's part of the experience and the fun.

I hardly do any PC gaming, but I do play a lot of games on Nintendo consoles—including a few indie games that are more often than not available on Steam as well. I can highly recommmend the Shantae series of platformers, which are packed with character and humor. Steamworld Dig is another good, if occasionally frustrating, game.

I'm a month and a half late, but I just added you on steam. AZBlue13 is what it should show up as.

Definately get a 3DS too.