Much like the saying that 'An Army marches on it's Stomach', Crafting would be nowhere without raw materials. Personally I have found harvesting relaxing in most MMORPGs I have played. For example, I enjoyed kill mobs in WoW and skinning them for their leather, in EQ2 running around harvesting Shrubs for food items (which seem to make me hungry IRL) and other resource nodes wishing for that special sound that means you found a rare. In Vanguard you could harvest in a team and getting extra benefits for doing so. And there is EVE online in which harvesting, i.e. mining, can be politely be told GO TO HELL.