I checked Lords of Shadow in the poll because its a version of Castlevania I absolutely love and enjoy a lot (sadly LOS2 ruined it) and probably the Kojima game i've replayed the most. That said tho, I do think theres more merit to the MGS series, specifically MGS3: Snake Eater - which for me at least is the best in the series - Everything about that game is top notch, memorable combat, story, boss fights, its Kojima at his best. 

Honorary mention to Penguin Adventure because sure why not.