Sangria is all about the person making it!
You can add other liquors like brandy, or just use straight wine.
The best part of sangria though is definatley the fruit!
There is an unlimited number of recipes…
Some tips:
-Oranges and/or orange peels
-Sprite! (gives it a little sweetness, and the carbenation makes it like sparkling wine!)
-Apples (i personally prefer thinly sliced, but any way you want is also good)
-Some lime or lime juice
-Cherries
-Maybe strawberries
And I usually stick it all in a punch bowl and let it sit in the fridge over night because then all the flavors are realease.
The thing that is nice about sangria is that you can use pretty much any kind of wine, even the cheap boxed wine because the fruit will totally transform the flavor.
I think that red sangria is best, but if you are a white wine fan you can use that too. Crisp flavors like green apples, lime/lemon will do well… and again sprite!
as for how much, you will have other drinks, so a large punch bowl or 2
here is a great web site for many recipes, but go with what you like!
http://www.lisashea.com/sangria/