Im 27 and have own'ed' 3 diesels and 9 petrol cars.
The first diesel i bought i sold within 5 months as i hated it. The 2nd diesel i bought i sold within 6 months as i hated it.
Then i had a loan 320d 8 speed and a loan 2012 Golf GTD manual, which were both extremely good diesels, particularly the Golf with had a great little noise and super smooth changing manual. I completely agree that diesels are refined and smooth but they lack the finesse, excitement and zing of a petrol motor.
IMO 1 thing i have noticed is diesel seem to suit auto boxes more, generally.
On the other hand i have had fun in every petrol car (except the mondeo) i have owned. Modern turbo petrol cars are amazingly good road cars and give you relatively good economy with masses of power and low emissions. But you can beat an NA petrol motor. IMO turbo petrol cars are a happy medium between diesel and large NA.
We now have 1 petrol and 1 diesel car for 'sensible' reasons. Thats just it if i had unlimited funds i doubt i would ever own a diesel car, unless i could afford a diesel LMP1 car