An enjoyable story - A story can be wacky and not make sense all that it wants. As long as I enjoy it, I won't mind.
Character(s) - If this a group situation, I can normally avoid using any character's that I don't care for too much. On the other hand, if the character is the only playable one, I expect them to be very fleshed out or entertaining to play with.
Music - It is like icing on the cake for anything emotional.
Combat - A challenging game will have me come back for years and years to come. Side content really pushes me to the max in a lot of cases.
Graphics - A picture can say one thousand words. FFXV is going to have so many drool worthy environments imo. I can't wait.