I'm more than my happy with the driving experience of my 1.4petrol,nippy,good economy pulls well even at motorway speeds.
Have not driven the diesel version but do drive a Corsa Diesel CDTI(56plate) for work so I'm aware of what modern small diesels drive like and to be honest I don't think I'm missing out.
I'm aware the diesels can be chipped up to considerable more BHP but either ones a good choice.
ps.Selling mine due to emigration.