I dunno if this is true of many of the big MMORPGs, since I\'ve really only played F2P ones, but things you do to the world seem kind of...limited.
For instance, if you chop down a tree, it regrows in a matter of minutes, or even seconds. If you light something on fire, the fire burns away without doing any damage to anything. If you mine a vein of ore, it is replenished aftera given time (instead of forcing you to dig deeper).
Now, I see two sides to this. On one hand, it makes the world more stable (if it took a year for a tree to regrow, forests would disapear awfully fast), and on the other hand it limits many aspects of gameplay, such as as creating a statically-inclined economy. If the same ore is always in the same place in the same amounts, then its prices will remain within the same range, barring tampering with the economy by people who hold significant clout. But if each vein of ore has to be found and mined out, then if there are *tons* of ore veins found all over the place, the prices of ore will drop because of its abundance, provided there\'s enough manpower to mine it. Or if only small amounts of ore is found smattered across the face of the earth, err, cave, then the prices will undoubted skyrocket as a result.
Forgive me if I\'m being stupid, but it seems kinda dull to have a statically-resources world. There are many, many ways just the ore being limited in different ways that could add some spice to PS.
For instace:
If there is a small amount of ore, someone with the right know-how could get a monopoly wether it be through legal tricks or straight up physical denial-of access.
If there is a lot, then a union could be formed to regulate the mining, to make sure that not too much of anything hits the market at once.
Meh, I could go on for hours. Input please. And please... I\'m just a stupid kid.

Don\'t torment me with the hell-flames.