Which fandom would you choose FDVR for?

Imagine you had access to fully immersive virtual reality (FDVR) technology that allowed you to completely immerse yourself in any fictional universe as if it were real. However, you could only choose one fictional universe to use FDVR in.

Which existing fandom or fictional universe would you choose to use FDVR in? Here are some examples but feel free to write any others:

• Harry Potter
• Marvel Cinematic Universe
• Star Wars
• Lord of the Rings/Middle Earth
• Game of Thrones/A Song of Ice and Fire
• Star Trek
• DC Comics