LogFAQs > #970332045

Generally speaking, turtling until you have a top-tier army isn't a great way to play RTS games. While you sit there waiting for upgrades, your opponents will be able to take advantage of your passivity to expand and collect more resources than you, which will actually enable them to produce a larger army and upgrade them faster than you can. That's not to say you should immediately launch a full assault on their base every time a Marine finishes training, obviously, but don't be afraid of sending out smaller squads to claim new territory or harass your opponents to weaken their economy, even if you end up losing those units. It's a balancing act that you'll get better at the more you play and try to improve.

Now, saying that, I also tend to err too much on the side of "make super army and hope I don't get killed first", while neglecting expansion and other macro aspects, so I get where you're coming from. But that's why I'm not very good at RTS's.