Anyway, under is not always the correct answer as it really depends on the match, the teams, the gameplay and many other factors but most beginners end up getting too excited and betting mostly on over without proper analysation.
Neither is over the answer. The game of football is to score goals and win, beginners are more interested in choosing over instead of under because everyone in the pitch wants to score and if those goals came through they will win their bet. There is a higher chances of much goals to be scored in a match that less goals. It is not about excitement, basically statistics proves over is the best choice.