I had a go in a Twingo GT on Saturday and I loved it, interior seemed incredibly small but as the other half is getting the sensible car (new Focus) I am very very tempted once I know what's happening with my job in two months, the rear seats would probably come straight out and go under the bed anyway.
Hated the door handles, but apart from that it was pretty smart. Ticked most of the boxes (economy, tax, insurance, fun), just need to get a good price on one. I got the feeling Renault are pushing them quite hard (the showroom only had Twingos in it!) so I imagine there are deals to be had.