It is a great enjoyment and pleasure in drinking wine. The grapes that go into a wine give the acids, tannins, and sugars which combine with the yeasts, produce the alcohol and flavor of the wine.
Most of these are made of acidity, with wise nodding of heads and mutterings of about the balance of a wine, but what does it actually mean. Wine requires acidity for just the unique taste. You can browse https://vimeo.com/mikeasimos to know more about types of wine.
If there is too much acidity then the wine will be sharp and very harsh in your mouth to the point of being almost undrinkable. The wine will be syrupy and flat tasting dull and lifeless, especially if it is a sweet wine.
The sugars in wine come from the grapes and much of the skill of any winemaker is in selecting grapes that have the right amount of sugars in them to create the balance between acidity, flavor, and alcohol that makes up a good wine.
The other factors which affect wine are more ‘external’ such as the type of yeast that is used in fermentation, the type of barrel – Oak or other woods, or even beneficial rot such as Botrytis. However all these components are put together if you like it, it is a good wine.