DEMON'S SOULS.............enough said for me......I am a gamer that continues to look for difficulty+ immersion in my games. This being said I enough a tough game to beat in the terms that Jimquistion said about kurby's yarn. Though the majority of my games are shooters, I find that Too much immersion in the case of MW2 simply leaves you thinking your skilled at a genre when the game hasn't prepared you for any other games in said genre.
That all sounds technical, so here the dumb down version for the gamers that went, "HUH? Did he just make fun of the greatest shooter ever?"
EXAMPLE: Take the RPG Uncharted: Drakes Deception, whether or not your familiar with the game, it is a large immersion game. This causes you to feel powerful and in a metal sense you feel like a great gamer. This is misleading because play the game Demon's Souls right after and you will lose hope for all mankind. Demon's Souls is beatable yes, no it's not a super game or whatever but for those not conditioned for a game like it, especially if you don't have internet. You will fail at it.
In conclusion, why I said all this is to show a contrast between everyone thinking of skill. MW2 uses a Skinner box system which makes the players feel powerful as they progress, whereas say, Resistance 2 makes you feel the game doesn't care and throws you into a match where everyone is equal in level, there is few guns that are overpowered but have weaknesses, and a overwhelming number of said player make you feel weak. My view on the topic of skills is that everyone will have a different view based on the games they play. Me my game I suck at and won't continue playing is Scooby Doo: Unmasked for the original Xbox, I have a horribly hard time with Old platform based games...........The game I am God at is Resistance 2 and MW2. The game I am horrible at but for some reason keep going is Demon's Souls, have played for 4 months still on the "Technically" second level. The game I will never touch is Black Ops, beofre the fan boys jump on that it is the same as MW2, just add zombies to mw2 and get rid of spec ops downgrade graphics rush the production time and kill hlaf your story boarders and you have Black Ops by Tryarch........yea infinity ward is much better.
Also, another game I suck at but I love horribly too much is league of legends, I'm Celtic57 and its a free game by riot games a link will be below, there is a huge download but the game is amazing if you like DOTA you would love this. Also, have fun and thanks for reading
http://signup.leagueoflegends.com/?ref=4db772715d8a6366009427