To make carrot juice taste better:
First, after you get used to carrot juice, it will taste good by itself. So
the trick is to get your taste buds used to it.
Start with something simple: carrot/apple juice. I use about a pound of
carrots and 1/2 to 1 apple. I found Golden Delicious apples to be the best
tasting combination when juiced.
Try cutting down the apple some and adding a stick of celery: makes a saltier
drink that brings out the sweetness. Another refreshing drink is carrot juice
with pickling cucumbers.
If the thickness bothers you, try straining the juice and mixing with water or
sparkling water to get started.
I rarely drink straight carrot juice, but I also combine my carrot juice with
one of the following: alfalfa sprouts, spinach, romaine lettuce, broccoli
(stems, not florets), brussel sprouts, ginger/apple, just about anything!