aramis erak
Legend
LOL, ironically I would say the exact same thing about GURPS Prime Directive. I really dislike GURPS as a system, but for the right type of Trek game, it would be a very good choice.
Though having just Googled it, I didn't realize there's a D20 Modern version of Prime Directive as well.......and, well, that's just about the worst idea for a Trek game I can think of. Having had some experience with D20 Modern it's just a bad system to begin with, I don't care what coat of paint you put on it. There's way, way too much D&D detritus attached to that system.
(Also had to step in and defend my beloved Savage Worlds. I'm a huge fan and think it's a fantastic system. But as much as I love it, it wouldn't be my first choice to run a Star Trek game.)
GPD is just a poor choice all around, too. It's GURPS Light included, sure, but it's not got support for active duty play in mind, the template prices are all over the freaking map, and the weapon damages are insufficient to emulate any of the shows. Plus, there's no ship combat tie in, and no design system tie-in, so the biggest strengths of GURPS are lost by virtue of not actually being able to do a major part of the universe. In no small part, its non-integration with ship combat is a bold faced (and openly so) plea for the user to "Go buy our other games, dammit!" Ignoring completely that the other games don't do what is needed. And it does very little to make GURPS do Trek better. It gives personal weapons, an overview of the SFU ships, templates for most (not all) of the major races,
I'm not too fond of some of the choices made in the racial templates, either. Most of them make me wonder who's been smoking what at ADB...
In fact, without the prime team rationale, none of the Prime Directive games are worthwhile for Trek-as-trek, and the prime team rationale is mostly absent in GPD (and PD20)...
But, hey... there are whole hate threads about it buried over on SJG... http://forums.sjgames.com/showthread.php?t=39679 is one such. Guy thought it was Real Trek and was pissed when he figured it out. Not helped at all by the crankiness squad reiterating the same refrain at him over and over...