[quote=@ArenaSnow]
Speaking for myself, if you leave me with an empty slate in which I could create a complete world without any limitations or restrictions and with full resources to do whatever the hell I wanted...

...I would never finish.

Given a decent structure of limitations, I can have a theme to base off, and then adapt to an extent that the result is original. Yet what I created was based off something else. Perhaps it was a desire to improve upon the original image, or just a spike of creativity caused by looking at something else. But well chosen limitations do, in their own little ways, make me more inclined to follow through on creating things.
[/quote]

That's the point I made in the setting section. Logic, consistency, and a setting provide direction and, by preventing confusion, encourage creation. Like I said in my introduction, I don't paint restrictions in a negative light, because some of them are important and useful.