I think an assassination type of mission would be great.Like have a big city setting and have the objective to be :kill none other than your designated target. I think there's a lot of cool ideas that could be implemented in such types of missions. Now, having played around 10 missions, my personal top 5 in no particular order:Business as usual(really great mission imo),In the North(much deeper than it first appears, the creator really gave life to that place),Lords and Legacy(incredible as well),Return to the city,The Alchemist.