Twins are flown in tasks that singles are not suited for - carrying VIP in IMC is one example, but there is a considerable number of twins which fall from the sky because of mistakes with the fuel system, or just bumbling into a hill when IMC and not supposed to be.
I have about 13,000 hrs in singles and 2000 hrs in twins, happy to fly either. But at night I prefer the extra weight and comfort of the second engine. It makes soothing sounds.