phoenix, you've just described my pet hate..! i played the original starcraft for many many years, enjoyed the game loads. the biggest problem i had was that, all anyone ever seemed to do was spam basic units and rush, defending such attacks became a matter of routine. the problem is so many RTS games promote such tactics, it becomes more difficult in games like supreme commander, sins of a solar empire where the maps are so big you'll spend loads of time actually finding your opponant, and by then they've already made sturdy infrastructure, expanded, etc. to be honest as much as im going to enjoy starcraft II i will rarely be playing it online with anyone but friends, since i can't be bothered with the constant rushing and 'clinical' build orders all these so called top players come up with. my personal opinion on the situation is RTS games are too over-simplified, even the original supreme commander was needlessly simplistic (and they had the cheek to say the second was dumbed down to make it more simple...), theres nothing to really exploit like supply lines or anything like that.
i think RTS developers need to stop being such pussies and make a proper strategy game, that requires clever thinking, has proper style of infrastructure: mining, transport, refinement, machining, etc. these would add so many more tactical opportunities and slow down the 'rush machine', it'll never happen though sadly since too many people prefer the 'simple' RTS over anything that actually promotes thought...