So sorry to hear about your dad - I hope things improve for him and that he can stop drinking.
I usually drank a bottle of wine (though not every night) for the last 8-12 months of my drinking. My withdrawals weren't too bad, but they were bad enough! Like you, I didn't have the blackouts, DUI's, or family problems, although I spent plenty of mornings with a hangover and I wasn't functioning at nearly the level I told myself I was.
What I did have (big time) was the addiction - I couldn't imagine life without alcohol. I didn't want to quit. Drinking was the highlight of my day. I would hide it, choose to be alone so that I could have more, pick events to attend on the basis of whether alcohol would be served, was irritable if I have to postpone my drinking, etc. etc. and the list goes on. So in truth I was just as sick as the person with that DUI.
p.s. I never could figure out why I kept drinking too much either.