Worldbuilding

I think the most forgotten aspect of worldbuilding is this: Make whatever you want!

Something I've noticed sometimes is people who are making fantasy worlds getting too caught up with arbitrarily-enforced notions of "realism," saying things like "Well, I want to have a planet made entirely out of candy but that's probably too silly for the setting" - like, dude, no it's not! It's YOUR setting, so go nuts! Your world is whatever you want it to be, so don't be afraid to go really "out there" sometimes! ^^