How do you decide when to create a long campaign or a short one?

I have been reading recently a few fantasy books that have inspired me to design some adventures, but I am unsure about whether to create a long or a short campaing.

The books in question are by Raymond Feist and George Martin. Independently of which one of them is the better writer, both of them have well detailed worlds and it is very easy to see the structure of the characters in the books.

However the main difference between the two is that one develops characters a lot more carefully (Martin) and the other relies more in letting you feel connected with the situation rather than the character.

Is it me, or we are not as entutiastic as we were 20 years ago?

In the hey day of RPGs we coulnd't get enough of it. We had conventions on a regular basis, our own adventures writen and played, our own magazine that was supported by local businesses which would advertise... It was awesome.

Now?... well, now is not the same.

I started the main mailing list in the town where I live about 6 years ago. It has worked really well, we have over 90 members. That list has worked really well to make sure we have quite a few active groups playing lots of games and at a good range of ages.

So far so good...