The best way to look at it if your not sure what to do is consider how many games you would go to if a member, assuming you can get a ticket of course. If you do 10 games taking into account membership cost and the 10% ticket cash which can be used against further ticket purchase, or you have a season ticket and re sell the other 9 the price would be pretty much the same. Assumptions used being cat b ticket prices for members purely for calculation (also guessing they are in line with new season ticket prices), and obviously someone buying your seat if re selling as a season ticket seat at 80%.
The more games you do the better value a season ticket becomes, and if less the membership is cheaper.
Main advantages of a season ticket also being a guaranteed seat when you want it plus you've got it for big cup games plus if we were lucky enough to get to another semi final and final you should get a ticket also.
On this basis, as much as I think our home form has made me have a serious think about renewing I know that I will always go to at least 10 home games a season regardless, this season missing my only 1 on Sunday, renewing is a no brainer really.