My current campaign has been running for 10 sessions or so and is hopefully just getting started.  My previous campaign came to a premature end after about 8 sessions (due to the birth of my twins), and the campaign before that ran for well over 100 sessions.  
I have a hard time understanding how people can estimate how many sessions a campaign will last. I have a hard enough time predicting where the party will be 2-3 sessions out, figuring out whether there will even be a campaign 20 session from now seems ambitious.
				
			I have a hard time understanding how people can estimate how many sessions a campaign will last. I have a hard enough time predicting where the party will be 2-3 sessions out, figuring out whether there will even be a campaign 20 session from now seems ambitious.