The higher the PG, the more flavor and hit comes through.
Re taste - what flavor, what brand? Your tongue can only taste sweet, salty, sour, bitter and umami (MSG). So unless your eliquid has one of those flavors, there is nothing to taste. You have to smell the vapor. Also, it is vapor, not food. A blueberry vapor is not going to taste as strongly sweet/sour on the tongue as a real blueberry. And without smelling it, ALL you will get is a bit of sweet/sour on the tongue. When you smell it, it should smelly like blueberry. This is how real food works too. By taste alone, a sweet onion and an apple taste the same. Cigarettes dumped their aroma all over you. With ecigs YOU have to remember to smell the vapor.
Things that can keep you from tasting - too much VG, not enough flavor in the juice, food/beverage flavors in your mouth, drinking hot liquids or alcohol, you don't have your tastebuds back yet, vaping the same liquid over and over and over, dirty atomizer, singed cartomizer
Things that can keep you from smelling - wind or fan blows the vapor away, other smells around, vaping the same liquid over and over