EE had the best map editor ever. It was so intuitive and user-friendly compared to its successor.
The best load of fun was putting two ginormous sides of various ahistorical forces (giant robo mechs, WW2 tanks, Cavemen, Hoplites, Cyborg Assassin Ninjas) and then setting them on to each other. I can't for the life of me remember how much time was lost on this wee afternoons relishing the fights of the histories.