Building a campaign

4th edition Dungeon & Dragons is relatively well structured, so you can predict how long it takes to level up. A full campaign has 30 levels, it takes about 10 encounters per level, which means the overall length of a campaign is 300 encounters. But with my group playing only every other week for an evening, and doing about 3 encounters per evening, that results in the campaign being 100 sessions long, or about 4 years, if we ever get to the end. Very few dungeon masters would ever bother to pla

World of Warkraft...