A nice reddish brown crema on the espresso of course signals correct preperation but… have you ever tasted the crema itself?!? To us it seems to be kind of dry and bitter!
Try to take some crema with a spoon from the top of a good espressoshot and taste it!
After having tried this we sometimes skim the crema of the espresso right before drinking the espresso using two small spoons. This seemes to give a more clean and less bitter cup which is finishing of extremly soft. On the down side the cup also looses some body. But it is definitely a good way to drink coffee if you wan’t it to be soft and intense!