I wouldn't go as far as 'unsightly' but I don't think it's a good looking car. A lot of people say it looks better when you see it in real life (rather than the pics) but that didn't work for me
Saying that, I think there are some interesting exterior design features, like how the side panels at the rear extend to the sharp edge for better aero and I actually like the narrow tyres which are showing that the engineers gave more importance to efficiency than aesthetics.
These recent threads from members explaining why they chose the LEAF over the i3 shows what a difficult job it is to design a car to appeal to the mass public, there are so many factors that can sway a decision. Personally, iffy aesthetics and things like the cheap looking kenaf panels do not put me off at all because I'm much more interested in the dynamics. The i3 has double the power to weight ratio of the LEAF, that is such a big difference and you feel it everywhere, not just acceleration but braking, cornering, the whole car feels more alive. I'm such a fan of light cars that I'm prepared to put up with a lot of aesthetic oddness but for some the power to weight ratio comes way down the list of importance and with the LEAF being considerably cheaper I can see how it makes a lot of sense to many people.