I admitted that tipping gives a good incentive to the person providing the service as I myself felt before. But I dislike tipping as I see people react differe

I admitted that tipping gives a good incentive to the person providing the service as I myself felt before. But I dislike tipping as I see people react differently whether you tip or not and the amount you tip. It was quite hard for me to really know what percentage to tip the person happy and to continue a good service. How do you gauge the quality of the service to tip 15-25% or even higher? That's just playing with our emotion.