Majority of the students in my wine class picked Cabernet Sauvignon as their favourite wine, and 90% of the wine I drink and collect is also Cabernet Sauvignon. I find that cab is one of the easiest wine to learn about and identify in a blind tasting. It has higher acid and firmer tannin than Merlot, but less "syrupy" than Syrah or Grenache.
The wine has three flavour characteristics:
1. black fruits: black currant, black cherry
2. vegetal: bell pepper, mint, cedar, menthol
3. oaked: smoke, vanilla, coffee, coconut
Classically, Cabernet Sauvignon was blended with with other grapes such as cabernet franc, petit verdot, and merlot. My personal favourite is Bordeaux which is a cabernet and merlot blend. However, the new world such as Chile, California, and Australia all have great success producing 100% cabernet sauvignon. Even Italy has started producing pure cabernet called Super Tuscany marketed at no less than $100 per bottle.
Canadian Cabernet Sauvignon? Not so good and over priced.