LOL @ the A380, as far as airliners that would get my vote for sure. I also agree the A318 is relatively ugly for an airliner, to me the A319 is not any prettier.
At least for the nose, the russian Tu-20 bomber is kind of ugly, the rest of the plane is interesting though.
The Shorts Skyvan could be another contender, sardine can lookalike.
This page has some pics that show the bartini's wings(they are missing in the above pic) and one of it inflight with inflatable pontoons.
http://www.ctrl-c.liu.se/misc/ram/vva-14.html
"Well for me, every single plane of Airbus, simply auful[sic] and mediocre.
But the Boeings must win a masterprice[sic] gift because of the good a/c they are."
Really fanatic opinion. Isn't it?
'Science without religion is lame, religion without science is blind'. Albert Einstein