Sputter...gasp!?!?? Do you need to ask? The problem with 3e is that its got no soul. Its a rule set. It can do fantasy, it can try to do lots of other things, but it cannot compare to HackMaster.
D20 is an engine designed to make WotC money. No body at Hasbro gives a damn if you have played for 20 years or just picked up your first PHB at the local Walden Books yesterday. They care about making that 29.95 plus tax. They care about making you want that next hardback. They've got it down. New book every month, new Corebook every quarter. Take a look at the Origins awards; D20 got slapped down. The 3rd party publishers are scrambling to get out anything d20 because they know it can sell. 85% of it is garbage! Slayer's guides! Ring's of Power! That logo must mean its good, right?
Wrong. Thats what the awards said. And I agree.
HackMaster is a way for K&C to make money too. Duh. But its more. Its gaming for the sake of Gaming. It's pure. It's parody. It's a game that lets you say, "Yes, I'm sitting around a tabe playing pretend with my pals." I dunno, its hard to explain. D20 is like a major Hollywood flick; Its made to appeal to several demographics and it is made to cater to the massses. Like "Gone in 60 Seconds"(the remake), its a fun ride, but when you step away, there's nothing there but flash and stars and money spent... its sort of empty. Fun, but empty. HackMaster is like the movie you love, but not alot of people get, you know? The movie you can tell that was made because someone wanted to share _something_ with the world, not the move that was made because the numbers said so...
Anyhoo, I vote for HackMaster...