Bought my Jazz because :-
I had owned Hondas before and they are bulletproof and good to drive.
To save on the repair costs that owners of other makes seem to take as part of owning their car - the only costs on my other Hondas were tyres, exhausts, brake pads, and oil.
To save on fuel - because it will never go down in price again.
Being green was the least of my reasons, I think global warming is the biggest taxation scam ever! The last 10 years have been the coldest / wettest average on record.