The taste and scent of women changes depending on their monthly cycles, hygiene, what lube they've used, genetics etc.
Sometimes a women can be very neutral, very musky, or the fishy. We all have different taste buds as well - what tastes great to someone may be awful to someone else.
I've found redheads, with paler skin, tend to flush more, but taste wise, haven't been with enough to say if there is some difference, but I've never had a bad tasting one.