Here's my list, in no particular order:

• Soulsborne franchise (actually started with Demons Souls on the PS3, I was very frustrated playing it at first, and at some point it just clicked. Now I play them relax)
• Flashback (the original DOS one)
• Baldur's Gate 2 (go for the eyes Boo!!)
• Wing Commander series (I always think of Mark Hamill as "Maverick" Blair instead of Luke)
• Unreal Tournament (I'm still mad at Epic for killing the development of the new UT version)
• Diablo 1 and 2
• Halflife series

Knower is awesome, I wish I could see them perform live.