"gameplay, DUH! TC is so stupid for asking such obvious questions🤦♂️"
Gameplay as an answer is too broad. What is the one specific thing that is the most important to you? Art style, combat system, enemies variety, enemies design, etc.
Personally, its the aesthetics/art direction. If its not to my liking, even if the "gameplay" is good, i will never enjoy the game as much as i could have.