Strida 5 for it's combination of design simplicity, engineering excellence a triumph of form over function! Just did the Bristol folder ride on my 5, 20-25 miles of hills, rough tracks & only 1 hill beat me (as it did for most of the riders) there were several Brommies, SPs, Moultons, Dahons (inc 1 curve), 1 Micro, 1 Thompson & Jac my son on my GoBike.
Second place to GoBike purely on lokks let down by engineering deficiencies & lack of support.
Closely followed by the new Birdy in terms of looks but the Birdy beats the GoBike hands down in terms of ridability & engineering detail.
In the 'Breakable' dept. the 'Pylon' Moulton if money is no object & the Airnimal for it's beauty combined with sporty practicality.