I think just about every piece of media has had an influence on me, some obviously much greater than others. I think the most "oversized" ever would probly be Kingdom Hearts, it set the tone for my taste preferences from its release through the rest of my life hehehe.

For something more recent I would say In Stars and Time, that was writing that saw through to my soul and helped me heal in ways I couldn't even fathom before playing. I will recommend In Stars and Time to every person I meet, and have even gifted out several copies to frembs last holiday season <3