Yep, loved it back when it came out. So juvenile and offensive for offensiveness's sake but that's its charm

You smoke crack to get health back, if you catch on fire you piss on yourself to put it out, use cats as silencers for shotguns, and a group of environmentalists want to kill you for returning a book to a library "save a tree, burn a book". How can anyone take the game seriously?
I remember the loading times were really horrible back then (somewhat better after a patch), but on modern hardware its a non issue.
Just have to set a custom res and change the FOV via cfg file to get widescreen without looking stretched:
http://www.wsgf.org/dr/postal-2
You can get P2, share the pain and apocalypse weekend on GOG.com for $10, no DRM and a nice single file installer.

I bought it from there a while back, such an old engine but if you put all settings on highest and force really high AA/Anisotropic filtering via your gfx card's settings it looks nice and crisp. A street full of people running around on fire is still pretty funny to watch.
I think its on steam now also, but with DRM.
Its a shame how bad Postal 3 was, nothing like 2. Outsourcing it to some random Russian devs and taking no responsibility for it was pretty crap, the RWS guys do seem like douches when they post about things.