@N7: Twin Snakes is not awful. I still don't get the shit people gave that game. Other than people nitpicking over some of the VO changes and other tweaks. The gameplay is way better since it ropes in all the MGS2 mechanics.
Snake, backflipped off of a missile. That ruined the entire thing for me. Playing TTS and then going right into MGS2 is a big mistake because the cutscenes were so over the top and wild and incredibly more actiony than they had any right to be. Especially more so than MGS2. So if you see those cutscenes you'll probably think this is what the series is like, and while the game did get have some amazing scenes(The Liquid Snake/Solid Snake fight on top of REX for example, and then the entire Gray Fox murderspree), it's a bad representative I think.
I mean, okay, it's not a bad game, and it did a lot right. And David Hayter even gave up half his check just to make sure they could get as many of the original voice actors to come back, but if you aren't aware of what the series is and want to jump on, you may get turned off by the way the game is presented in TTS. I've seen some people interested in MGS and then they pick up TTS and got turned off because it was too much, so I'm not taking a risk.
It's probably not TTS's fault if they got turned off. Metal Gear is just a strange series in general. And there were some truly ludicrous moments even in MGS2. (Naked Raiden sequence with psycho Colonel AI, Liquid's arm, bullets being repelled by Fortune, a fat man in roller skates planting bombs and drinking daiquiris or some shit. Backflipping off a missile is nothing.