All of the reasons listed above and more.
What helps me the most is to remember who I was/am without alcohol and move towards the positive and remind myself of all of the fascinating and interesting people in the world who are even more fascinating now because they no longer drink.
I want to have a say in how my loved ones perceive me and look at me and I know that if I drink they will only look at me one way ever and they are too important to allow that to happen ever again.
I am no expert by any manner of means but all the good advice from people here saying that it will get better and to stay strong is the best stuff to take to heart.
Wishing you well getting through today, keep strong!