I like the orchid white, I have seen a jazz in that shade and it looks very nice.
I am growing to like the venus orange (flamingo pink in some lights!) it is unusual and easy to find in the supermarket car park. However, I would not have chosen it new.
We also have an ocean blue jazz, and I would have had red if I had had a choice. The venus orange colour did allow for some discussion around the asking price!
When I was a kid, we lived in Rickmansworth, and quite a number of houses on the local estate were painted the dark red colour of a large building/plant firm in the town or the dark red/purple of the Metropolitan Railway. Both colours similar, but you could tell which company the bloke worked for. Thinking about it, water company blue and british waterways blue were quite popular too!
Of the new shape colours, I like the Azure blue or Milano Red best. The silver and grey look smart, but my last car was grey so I am enjoying having some colour now.