Hmmmm. Just off the top of my head:
Omaha Beach from Medal of Honor: Allied Assault. Will always be awesome.
The Heat-inspired bank heist mission from GTAIV. Makes me super excited for the heists in V.
As far as bosses go, pretty much all of Dark Souls.
01/12 - Zero Boys?
01/16 - Origin w/ Trog
01/24 - Into It. Over It.
02/09 - Amon Amarth w/ Enslaved, Skeletonwitch