I use about 3-3.5lbs berries per gallon for my wine. And Arpolis has nailed it when he says to use lemon, it takes it from a good wine to a great wine. Also I found that aging blueberry for about 6 months is ideal.
http://www.giantfreakinrobot.com/scifi/6-reasons-star-trek-voyager-worked.html?utm_source=zergnet.com&utm_medium=referral&utm_campaign=zergnet_204449
TNG and voyager were my favourites, voyager was very underated IMO