Warcraft 3 forever (or until WC4 released), SC and SC2 is silly strategy, at least for me, I never liked quantity and always liked quality. It's almost the same as compare Heroes of Might and Magic and Disciples. In SC lots units, requires great macro control, units die like flies, just make lots zealots as tanks and then pack of dragoons, send zealots on "A", and with dragoons click righ mouse button on enemy unit - and it dies. Also you can always see clones of the same type unit in big quantity, almost every strategy has this problem... while at WC3 making one type unit can own only noob, because at WC each unit plays his role and has his strength and weakness, also it requires player to care about his units and see what enemy do. Melee has heavy armor, then make magic-damager vs them, ranged unit has piercing damage and medium armor, make melee vs them, casters unarmored - ranged or siege units. Also you'll never see stupid mass of one type unit, and if you'll see it, then you can easily counter it and masser usually lose hard.
NE vc Orc makes lots talons, making cyclone on them to temporary disable big units and has magic damage, good vs heavy armor, NE thinks he is smart, because he watched some replays vs orcs, but orc simply makes 4-6 catapults (one shot and every talon in it's AoE is dead 'cause of siege damage against casters), 2-3 raiders (ensnare against talon to prevent some of them to morph into raven form + siege type damage too), some trolls (not big unit, advantage against cyclone, 'cause possibility to make lots trolls) and 8-10 bats (suicide on talons in air if they turned into raven form), few seconds and talons are dead. NE says that orcs are imba, because silly NE makes only one type of units, orc's scout saw it and easily countered. SC don't have this, SC is focused on stupid massing units and then player's macro control allowing or not allowing to control all packs at different points on map, while micro control plays not so big role as at WC.
So, I'll wait till WC4 comes out, and probably will play it, as for SC, this is game for kids.