MGS is very borderline shooter. It should be a refreshing change of pace for you as long as you're willing to play the game as the game urges you to play it. That means be sneaky, use as little ammo as possible, and let yourself get lost in the story. Ultimately you ought to play it however you want, but you'll most likely get the most out of it if you take this advice.
My Top 5:
Shadow of the Colossus, Metal Gear Solid 3, Shenmue, Skies of Arcadia, Chrono Trigger
My 2 nex-gen systems: PS3 
and Wii 
Prediction Aug '08: We see the PSP2 released fall '09. Graphically, it's basically the same as the current system. UMD drive ditched and replaced by 4-8gb on board flash memory. Other upgrades: 2nd analog nub, touchscreen, blutooth, motion sensor. Design: Flip-style or slider. Size: Think Iphone. Cost: $199. Will be profitable on day 1.
