My ladies taste has a light sweet flavor,the best way I describe her taste is Honeydew,no bullsh*t! She doesn't smoke or drink,rarely eats junk food,no red meat. She drinks a lot of water and eats lots of green vegetables. Mainly,cucumbers,parsley,spinach and celery,she finds a way to snack on those throughout the day. And for fruits she only eats,watermelon,strawberries and kiwis. What you eat,you secrete.
I love the taste. Each girl tastes different but most recently it's nutty, slightly sweet, um...actually quite difficult to describe! Put it this way, the guy should be incredibly turned on going down on you and his arousal will tell his brain that it's the best taste he's ever encountered since his taste buds started functioning.
As the other guy said, if he puts his tongue inside you as far as it can go, then he likes the taste of you.
I love my girl's taste and go down on her almost every time we're together because her smell and taste are such a turn-on. I would describe the taste as sweet. As long as you shower regularly (doesn't necessarily need to be right before he goes down on you), I wouldn't worry too much about your taste. He'll like it.