Single or Twin Engine Airplane?

It seems there are many opinions on whether the single engine airplane or the twin engine airplane is the best choice. The Piper 6x is a single engine airplane and the
Seneca V is a twin engine plane. Both of these airplanes are manufactured by Piper Aircraft. My dad, a Piper fan, was of the single engine persuasion. He was a big Apache promoter until the PA-28 Cherokee was introduced. Then he was in love with the Cherokee. He never owned his own airplane even though he did have his pilot’s license for single engine aircraft. He did see the need to have two engines in his airplane, so neither do I.