Age of Wonders II besides SEIV is my biggest time consumer. Still a lot to learn about magic and fantasy races in it, just the AI could be improved. I like to provide my heros and fantasy creatures with different combinations of spells and the large variety of different flying, creeping, swimming, elemental, undead etc. units to play with. It's just MAGIC
It can be setup as classical turn based or a kind of quasi simultaneous but still turn based mode, where the AI can process its turn whilst you are doing your turn, nice idea, I think.