For a poor-design experience, try clambering into a taxi during a rainstorm. This is something that has to be done quickly, as there's often an annoying car honking its horn behind you and/or other citizens ready to steal your rare find; and trying to simultaneously seat yourself, collapse your umbrella and shut the door without getting wet requires the manual dexterity of a freaking Shaolin monk.

One car I wish the taxi fleets would look at--assuming it sees production--is Daihatsu's quirky-looking DecaDeca concept, unveiled at this year's Tokyo Motor show. The "super box" design features an extremely low and completely flat floor which, coupled with pillarless suicide doors, should make ingress and egress supremely easy.

The DecaDeca wasn't designed specifically for taxi purposes, that's just our wish; the car's prominent interior features include "fold-away seats [that] can be arranged in a variety of patterns to perform work inside the vehicle or stow large items" and a gi-normous flatscreen with a fold-down desk, which would also make this the ultimate mobile computing platform--for example, we could see it being used as a small "base station" during an exterior film or photo shoot, with camera people outside and an editor working the decks inside.

The car would have a three-cylinder engine with...ah, who cares about the engine? Check out that interior!