Lets just take a minute to appreciate all the dope cars in this show.... Can you imagine what it'd be like if Gilligan had signed a deal with Toyota or one single manufacturer and had to use all new cars like so many other series do?
The Bounder: Pure necessity... Hard to get started..... On the verge of a breakdown
Walts Pontiac Aztek: The running joke of the car industry. A car that trys to be a little bit of everything but excels at nothing.
Skylers Jeep Wagoneer: Durable. In it for the long haul.
Jesses Monte Carlo LS : Candy paint... Hydros.... and an anemic v6. All show no Go just like Jesse in the beginning of the series
The goons Monte Carlo SS Aero-Coupe: Polar opposite of Jesses Monte ; All Black... V8... No tint... No rims... Nothing poser or flashy about this car... A real gangster car (Sidenote: Im really suprised they used a glassback Aero-Coupe considering they were extremely limited compared to a regular SS)
Jesses Toyota Tercel: 4wd... Compact... Efficient... This car really shows Jesses growth from the poser he was in the beginning of the show
Hanks Jeep Commander: Tough... but not durable like Skylers old school Jeep
Gustavo Frings Volvo 70: The perfect car to say "I play it safe"
Walt and Walt JRs Mopars (SRT 300 & SRT Chally): Polar opposite of Gus' Volvo.... Loud... In your face... Not playing safe.
Emilios Buick Regal: Again "all show no go"... This gangster got taken out by a HS chemistry teacher.
Mikes Dodge Diplomat: Mike... The "Diplomat"... Enough said.
Mikes Buick Century: Reliable... unbelievably reliable. "Century" could also be a nod to 20th century and ways of the past.
Tucos Escalade: Unnecessarily flashy, yet functional... Why not just a Tahoe? Oh thats right...because your an egotistical maniac
Saul Goodmans Cadillac DeVille: Very last of the Caddies with "Fins"; evokes love it or Hate it feelings in almost everyone, not many neutral opinions . Surprisingly fast and more efficient than it looks.
Badgers Pontiac Fiero: Lots of fun.... no power.
Sauls "guy" Toyota Previa: Ultimate Sleeper. Unbeknownst to most people, these were RWD with optional AWD and a factory supercharger..
Edit:
Walts Volvo 240: Safety (presumably in New Hampshire hence the plates)
Walts Cadillac DeVille: Return to danger in New Mexico, hence the NM plates