I have to agree with Gunny, most everything we do is really closer to an operation rather than a mission.  Most of us do tons of reseach on what we build.  Even in Armor campaigns, I research my subject, I don't just grab some kit and start building it, I have something specific in mind .  Ships are a lot worse because they are basically one of a kind and they change throughout their lives, so you have to research to get the right configuration and color scheme.  Besides without sounding like a pain in the butt,  I think there are way to many campaigns going on.  We seem to run about 5 or so a year (ships) and it is starting to get a little confusing about what is going on with them and too many simularities and overlapping subject material.  Too many means lower participation.  I ran the MEOW and had 145 participants of which about 46 actually completed it and it was 6 months to complete a tank.
Sure, you don't have to sign up for all of them, but as most of us are buddies, you feel you are letting the guy down by not signing up for his campaign.  So as for me, this year I'm just going to wander aimlessly and I siged up for the sisters campaig in anticipation of getting a cruiser kit.  NOw I see someone proposing a cruiser campaign...(see what I mean by overlapping...I think most of us have are doing a variation of the impending San Francisco for the sisters)
Just my 2 cents worth...but the main reason I quit participating in the Armor ones..I did 5 in one year