hello,i definatly prefered the chocolate,i had cheated a bit as i was so hungry i was having horrible headaches,i was also eating carrots was never told i could not eat carrots,lol,my mother tried vanilla as i had alot left over and mixed with black coffee was amazing she said,and now it is a new and improved optifast it dose taste better then when i had to drink it last year,but who ever is on optifast judt remember what the outcome will be and what your working for,i know its hard and its always worrysome to thin what if they open me up and they cant do itbecause the liver is still big or swollen,i did it for 2 weeks but for those who are doing itfor 4 or 6 weeks its much harder,and even if your bmi is under the mark you still might have to di longer,my momscblood tests came back and was told to do it for 6 weeks as her liver was fatty and enlarged,so it was shocker,so myadvice never think thatif your under the right amount for the time of optifast because your blood tests may show something different needing to stay on optifast longer,Amanda