Like most I started with 5 gallon batches, thought 5 is good, 10 would be great!! Problem was as the only drinker, it was a long time between brews and not only did the beer suffer with age, by the time I brewed again it was like starting all over again--memory issues. Now, with 6.5 Anvil, I hope to be able to remember from batch to batch what worked and what needs to be changed/improved. Overall goal--better beer/more variety.