World of Warcraft. There's a lot to do there. I wish I could get back my wasted time 
To Re-Waste it.
Botting wow seems to me a precursor to mining. A ton of folks over at mmoglider made a killing in their heyday.
The problem with botting is that they ban your accounts. Blizzard is quite stupid doing that, as botters are also customers (which usually have multiple accounts and therefore pay more for games/expansions and subscriptions) and produce something very useful for other customers.