Are you aware of the psychological aspect of how bettors choose between over or under? For starters, over/under bets is a type of sports betting where bettors try to predict whether a combined number of score of both teams is over or under a predetermined value. It is observed that beginners tend to bet on the over side. Why? Because over means excitement.
Psychologically, over or under bets are made for several reasons. The most logical reason I do it is because for that match the analysis has been at the crossroads between choosing this and that until finally choosing over or under.
Over or under bets are indeed the most fun bets I've done so far. If I do multiple bets, one of the choices in the list must be over or under.