Late night and Early morning are prime time for fishy players, especially if you live in a country that is on an opposite schedule like me
My reasoning behind this is that even good players start to play badly at those times, especially those that may like to have a few ****tails when they play. Honestly, I find this to be the case at brick and mortar
casinos too. When I paly in the day I usually lose or break even. If I play late night there tend to be fewer players, which caters to my style, and they tend to be intoxicated and I win 80% of the time.
BTW I seem to remember reading that big time pros like Barry Greenstein when he was coming up would sleep during the day and only play at night when he was sharp and fresh against the drunk, surly whales.