What is a fun video game to play

It depends on the genre you prefer.
Here are some suggestions based on the top games of the last few years based on sales figures:

• Elder Scrolls V: Skyrim
• Elder Scrolls Online
• Minecraft
• The Last Of Us
• Call Of Duty Black Ops 1 & 2
• Call Of Duty Ghosts
• Battlefield 3 & 4
• The Assassin's Creed series
• Tomb Raider: Survivor
• Titanfall
• Plants vs Zombies 2
• Far Cry 3
• Bioshock Infinite
• Grand Theft Auto V
• Dark Souls 2