Features that should be in every game.

[Beware of Cuccos*]

• Map
  
• Compass
  
• Unlimited inventory space
  
• Customizable characters (not in games where your character is an actual character of the story, such as Zelda or Mario)
  
• With custom characters, allow us to change our appearance whenever we want. In WoW you can pay (with in-game gold, not real money) to change your hair color, hair style, misc. head features (my main character has horns), and you can even change what your armor and weapons look like (the high level armor is pretty ugly, so you can find other armor and weapons, including lower level, that you like and pay in-game gold to change your armor to look it). In The Sims 3, you can change your hair, clothes, and even get tattoos.
  

Here are some examples of the armor changing process in WoW, called transmogrification, used for superhero Halloween costumes.




And just for fun, here's one of my characters, decked out in a purple and green transmog :)