@ForwardLooking -- yes, they likely will come back. Among other factors, alcohol disrupts REM sleep, which is when dreaming happens. Also, I sleep through the night like a normal person again, instead of regularly waking up at 4 a.m. unable to go back to sleep (I almost never got hangovers, but the lack of sleep sure took its toll on my brain). It took a couple of weeks for me to "tune in" again to my dreams, and I am so grateful to have them back now!