I vote for Awakenings, with other notables being Crucible, and the Eagle campaign.
Eagle may be short but i liked it because, not only do you have to scrounge fighters and weapons however possible (i mean you start with a modified Amazon drone and the "ML-22") but it also adds a lot of civilian flavor.
Besides i think its funny when pirates jump in, intending to steal the cargo you're protecting, and begin laughing hysterically at your pathetic little drone and 2 sentry guns.

Oh yeah i forgot! I actually was in the process of making more missions for Eagle a couple years back. It involved not only acquiring new ships/weaps, by buying legit or stealing from the HOL or pirates, but also becoming a more respected mercenary group. Sort of like Mech2:Mercenaries in the FS universe

[This message has been edited by Mad Bomber (edited 09-21-2001).]