Following a historically bad year, Hasbro rebounds a little bit in 1993. But not much.
Ghost-Striker - Even with the gimmicks, this is an excellent toy and stands up well against most other vehicles. My only complaints is that it has some orange bits and it is a two seater (trainer?). Otherwise, this is the one from 1993 that I coveted and ultimately gets my vote.
Mudbuster - I lump this vehicle together with the Badger from 91 as completely laughable and uninspiring Joe vehicles. And that's completely ignoring the awful colors; even a rattle-can couldn't save this from being pathetic.
Shark 9000 - Looking like something the Joes created to counter the Moray, this boat combines speed with firepower quite nicely. The shark torpedo is more comical than cool (Does it swim? You're kidding.) And the colors are really bright, but actually work in a Coast Guard kind of way. Not great, but respectable.
Dino Hunter Jeep - Didn't like the Fox, and I honestly can't agree that the color change was an improvement.
Monster Blaster A.P.C. - I really like this vehicle, 70% of it is in military colors, it looks angular and speedy, and it has a neat bolt-action blaster on top.
Ninja Lightning - My brother had this bike, I remember thinking it was too big, fat, and ugly. Kind of the Kirsty Alley of Joe motorcycles.
Piledriver - I didn't even know this vehicle existed. The name sounds like one of these:

Looking at it on YoJoe.com, I'm guessing that isn't too far from the truth. It looks like a Pile....of something.
Armor Bot - Wow, never seen one in real life, but man that is a huge mech! I'm surprised it hasn't become one of the more coveted pieces for collectors; it's big and probably pretty rare. Except I can't say I really want one myself.
Star Fighter - Not a big fan of when Cobra vehicles become Joe vehicles (or visa versa). Rip off the orange bits and it becomes a decent looking space fighter.
Beast Blaster - A neon Thunder Machine? Pass.
Sonic Boom Tank - A repaint that actually improves on the original vehicle? That's rare. But the Paralyzer it is based on is such a stinker, I still can't give it much love.