Dolphin emulator + Twin Snakes + Dual Shock 3 is probably the best way to play on PC. If you're willing to splurge on a GC controller adapter and Wavebird then all the better. Of course, emulating is a grey area so I recommend picking up a disc copy of the game to soothe your conscience.
In any case, I recommend staying away from KBM controls for the Metal Gear games. They were designed around playing with a controller and that would be the best experience.
Twin Snakes is extremely inferior to the original game. It is almost trivially easy in comparison, and the tone is completely changed towards a much more silly style. The original ALL the way.
Mad Max (1979), 4/5 - Stunts are still good and I always like a good revenge story still. It has a bit of a pacing problem in the middle somewhere. Other than that, its simple but good.
Mad Max 2: The Road Warrior, 5/5 - Awesome, improved upon the first one in almost every way. Stunts are bigger and cooler, story is more evenly paced. Some characters are hit or miss but overall its immensely enjoyable. Still holds up well.
Mad Max: Beyond the Thunderdome, 2.5/5 - I somewhat liked the first part, second part is bad, ending brings it back a bit. Overall it has too few car stunts, the first part is cool but still a bit weak. I want Mad Max to be more cars and cars doing cool shit.
Black Sea, 3.5/5 - Very intense submarine thriller. Has extremely high highs, but some unfortunate lows. Overall it really manages to capture how terrifying it could be being on a submarine. Jude Law is great.
I hated it. It felt like they took everything I hated about DA II and just expanded upon that. The setting is more fantastical and goofy, compared to the dark, dreary medieval fantasy of the first game. The combat is completely brainless and just hammering abilities as they come off cooldowns. Its extremely shallow, has a big world with lots to do but all of it is ultimately meaningless and dull.