What are some fun decision-making video games such as Mass Effect

-Dragon Age (mostly Origins, but 2 has its moments).
-The Witcher series
-Alpha Protocol, if you can get past the gameplay (I personally have nothing against it, but a lot of people despised it)
-Neverwinter Nights 2, especially its first expansion, Mask of the Betrayer
-Deus Ex series (again, a lot of people hated the second one, but I personally found it enjoyable)
-Planescape: Torment (over 10 years old, but fantastic nonetheless. Plus it's 10 bucks on gog.com)
-Fallout series
-Knights of the Old Republic series
-and, my personal favorite game ever made, Vampire: The Masquerade- Bloodlines