lol @ that Kojima pic. "S-Snake... What took you so long?"
Its strange how you said it gave you a NES feeling, because I had a similar feeling. It felt reminiscent of the metal gear MSX games somehow to me.
This game is great, definitely worth the 20 dollars I paid for it on ps3. I just beat all the side ops (except Deja Vu) and that took me about 5-6 hours because I never kill enemies in mgs games. I haven't even started collecting all the stuff yet which will take a very long time.
How do you feel about the gameplay in comparison to other mgs games? I think they made it a lot more accessible and simpler to pull off things you could do in the older games like knocking out guys and cling to walls.
I agree, the gameplay is smoother somehow, specially when compared to Peace Walker, in which was really hard to pull out some stuff. I want to do some ninja playthroughs like yours (not killing anyone), but some side missions are reaaaaaaaaaally hard, we will see.
The extra stuff, as you said, will take forever to collect, but I will try my best.