Well my very first mix i had to dilute by a good bit to get normal the others were fine though could have done with a small bit of sweetener. I usually like desserts. i have a few ordered in to make a few flavours
I'll just give you a few tips I wish I had gotten in the beginning.
Buy the smallest volumes of concentrates till you know it's a good one.
Research and notes. Just because it says something on the label might not be what your taste buds taste.
I have many different Strawberries and many taste different between mfgrs.
Write notes on how it tastes after a day, 4 days, a week.
Look at what you made. You should have a good idea of what you need more or less of in the future.