B.O.G.A.N
I've seen a few matt black paint jobs. One on a 180sx with a skull and crossbones sketched with white spraypaint on the bonnet, pretty cool in a "i'm too hardcore to look nice" kind of way.... or maybe even a mad max kind of way... maybe... another on a silvia, similar effect, i dunno though its a bit psycho. Lastly I've seen a matt black commodore with matt black mags, looks like a sort of "hillbilly from hell" deal. Like an "i'm a f@$king moron but i'm really scary" sort of look. :D
Anyways don't go matt unless you're a pirate, a bogan or just really hardcore. :(
Spraycan jobs can end up really average too, I'd use a spraygun over cans for sure. I have a mate who did his valiant first in spraycans with clear coat, which looked average and faded after not too long, then he did it with a gun with roof paint and its solid and glossy, good stuff. Then his car got flooded and buggered in an underground car park but thats another story.
Maybe even mix your own colour when u get your hands on a spraygun! :P