Big campaigns can be fun, and are certainly worthy of a hefty amount of respect, but for my part, I'd rather see a superbly written one or two mission campaign that I'll go back and play repeatedly, verses a large campaign I'll only play once.
I don't think there's any way to judge which is better, since so much about this topic is relative to the user. Those of us with limited amounts of time would probably prefer to wrap up a well-written plot in a short amount of time, while those of us with more time on their hands may want a more immersive experience. Which is better depends solely upon who is playing.
In any case, I lean more towards the shorter campaigns, because the authors have more time to work out all the bugs in the code and the key points in the plot to make it more interesting. That's not to say that well written campaigns with many missions don't exist, though. Verdagon, your mission pack on the return of Fox is proof of that.
The point I'm making is that if you publish a mission, make it a well written mission, regardless of how long or short it is, and people will play it.
