Ah yes, this is also my favorite RTS of all time. It did so many things just right. I fail to understand why RTS's that came afterwards failed to steal the stellar ideas that Total Annihilation pioneered, and instead kept regurgitating the same old formula.
I am not lying when I say I played this game for as much as 16 hours a day, for the better part of... who knows, 3-4 years? When I wasn't working I played nonstop, when I was working when I got off work I gathered my unemployed friends and brought them all over and played in the evenings. Great times and great memories.
Jeremy Soule's soundtrack was amazing. He also did the music for Guild Wars, another great game with great music.