Starcraft and DoW would both fall under Strategy games in my eyes as they involve economics, base building, army compositions, deployment strategies, logistics etc
DoW2 however as an example would be an RTT as the emphasis is switched to individual unit control and micro-management with a focus on small scale battles centred around POCs.
Its a very subjective line and everyone is different...however something like Demigod would be in most peoples eyes (at least those who understand the concepts of strategy vs tactics) a Tactical game.
If you don't think so, more power to ya, we all have our opinions.