This is coming from someone who has absolutely no interest in, or even understanding of, the whole "cosplay" phenomenon, but... those BSG-TOS costumes were true works of art! The Colonial uniforms with their brown/beige and blue variations were as iconic as the original Star Trek tunics; every dress designed for a female character was breathtaking; even the extras were wearing extragalactic yet totally believable stuff.
I never saw a costume in the series that looked tacky, cheesy, or half-baked-- unless you count the silver Lunar Seven suits, which I assume were intentionally designed as an homage to the cheesy futuristic silver getups of yore. Jean-Pierre Dorleac deserves to stand alongside Glen Larson, Ralph McQuarrie, and Stu Phillips as one of the true geniuses behind the show.

Costumes of Galactica, I salute you.