For me, if I'm 100% sober, I sleep fine. If I have 5 or 6 beers or white wine only, no more and no less, I sleep great. If I have 1-4 drinks, 6 or more, or red wine/liquor, I sleep like absolute shit. This only really counts if I have them right up until I go to bed. If I have my drinks earlier in the day and nothing from say suppertime onward, I usually sleep fine.

However, if I drink more than a couple days in a row, I sleep like shit regardless of how much I have and it takes about 4 days of no alcohol until I sleep well again. As a result, I really only drink on Friday and Saturday nights, with some exceptions for long weekends and vacations, which are offset by taking dry months every now and then.