I'd like to see several more adventures in the Forgotten War series. I think the mechanics of being a naval auxilary in this sparse sector gives the players a good balance of freedom of action and plot structure. Also, being set against the backdrop of the Fifth Frontier War could allow the campaign to eventually go on to near space-opera timbre with the players eventually having a chance to foil a sneak attack or some other dastardly plot by the Outworlders, allowing the plot to culminate in the award of medals to all involved, a nice way to end a campaign either temporarily or permanently.
Also, I thought the Mercenary adventures (Merc Cruiser and Merc Heaven) had the feel of a beginning of a campaign to me. I could stand to see a few more in that series.
PS - I just noticed that all three of those were by Micheal Taylor. Bravo! to you, and get back to work, dammit, I Want More!