For me, I think it's that you learned every nook and cranny of StarCraft. You knew the units and their strength, their health, how quickly 12 of unit X would wi

For me, I think it's that you learned every nook and cranny of StarCraft. You knew the units and their strength, their health, how quickly 12 of unit X would wipe out 24 of unit Y. You could basically predict health bars in combat (assuming you knew upgrade level.) In StarCraft II, everything felt softer, less crisp, less exact. Throw 40 marines at something. Throw 100 zerglings at something. Just keep throwing things out while you focus on upgrades and expansion. You didn't know if you would win or lose a battle, so you just spam the enemy with the units you expected to do best. But you never felt quite so in control as you do with the original. That's what it was for me.