For me it is not a question of willpower to give it up. I would need to be sure that the benefits of quitting outweigh the positive effects of drinking.
For some bizarre reason, when I have 2-3 drinks in the evening, I wake up feeling better and more centered. Physically, I do feel a little groggy, but nothing that 3 glasses of water, fresh air and a bunch of fresh fruits and green tea can't fix. But I feel better emotionally, more stable, just as if I had a reboot (like a computer)
After the ill-effects pass, I feel energized and ready to go.
I noticed that if I drink nothing for weeks or months at a time, I don't notice any increases in my reaction time or general mental acuity. I wish I did, cause then, this would provide me with enough motivation to stop drinking. I like the "flow state" I enter when I drink, I think that is how one should always feel, but I am not yet capable of being like that through meditation alone (or some other way), so I cannot deny myself the experience of having a drink or 2 from time to time without a reason. I'm surprised to see you say that you noticed so many great health benefits after quitting. I don't know if I would get such results.