No, I'm not really a big drinker but my rule is to not get drunk. I don't really wait for any specific signs to tell me to stop, I just don't drink fast so the pace I'm going at would probably take a very long time before I get drunk. When I feel that I probably had enough I start to switch to water or pop. Closest I've gotten to getting drunk is when I had 3+ glasses of wine in a couple hours. Lost track after 3 since I was just topping it up as I go. Walking was starting to feel funny, like I was about to fall, but yet, was not falling, and doing stairs fine. Probably very border line there.
I never slept so well in my life, and even the morning I felt like a million bucks, and the moment felt so magical. I need to drink before bed more often. I usually dread getting up in the morning.
Funny thing is, this was a family vacation, so if I did get drunk it would have been pretty awkward.