Which online games still have a good amount of players on them? Killzone Lib? Monster Hunter 2? Metal Gear Port.Ops? ect.

I'm thinking about getting a PS3 for metal gear i loved the other ones. But not enough to buy a whole system for, so besides Metal Gear what does the PS3 have that 360 doesnt?

p.s. little big planet looks awful

if my firmware is 3.75 do i need to download every firmware since then or just the newest?

i downloaded a bit Torrent for a demo of a PSP game how do i play it?

I hated Kingdom Hearts and to be honest the combat in FF7 Crisis Core looks a hell of alot like kingdom hearts

I got both the GTA games, killzone, portable ops and recently beat God of War when i rented it. What other games should i get?

Ps. i dont have online and cant get it(longstory)