Just curious. Is anyone opposed to have d) all of the above? Seems like a lot of folks are arguing that it should only be THIS way, or THAT way. But what if you had some HNM's that were instanced, and also some with a spawn window? You could have some nm's that popped every half hour, every 5 minutes, or even several hours. Isn't variety the best thing? That way you're appealing to both casuals AND hardcore players?