Just a small correction there. Heretic and hexen mooch of the quake engine, which has NOTHING to do with the Doom engine. Doom was a 2D engine, designed to look like a 3d game. Anyone who has ever tried Doom level design knows of the royal pain it is to keep track of this aspect.
Quake was not only the 1st true 3d game, but it had the best official mod ever made to any game EVER. GL QUAKE
That little mod, allowed graphics cards to make your games look pretty. It had never been done before and has been done ever since. ( well with directx nowadays but you know what I mean )
I'm glad to see orange box finally got people playing HL and HL2. I wish I had more time so I could even finish my own game of HL2. I understand Nick's perspective on character development and storyline. MSG is an established movie and your just acting the part of hero. This in contrast to a HL or Deus Ex sandbox RPG. There is a role to play, even a linear story to follow, but the path is just a tad unclear and you can enjoy a nice Disneyland effect between heartracing action scenes.
A good FPS is meant to be played at night, in the dark, with full audio blasting and no distractions. The more embeded you can get in the world the better. Trying to enjoy the scenery, sounds and interactive environment ( thank you HL, it was their idea 1st ). All this while you try to push forward keeping a semblance of a life meter without cheating on quicksaves hehe.
Exactly, when I think of the baddass Gordon Freeman, I remember the character that I developed in HL1. Deaths, scrapes, impossible stunts and chicken shit startles. The "Freeman Experience" if you will. True, the character is defenitely not fleshed out, but that's not the point of it's development. It would be a player's developer-guided Nurture to prefab's documented Nature. You basically get what you put into it. There was nothing even remotely like this at the time of its publication in the genre. The Mario Effect certainly applies to a certain degree. Play a game enough times and you'll develop an affinity for the character. You remember all your adventures and the "badass" moments that come when you dump hours into a game. Mario has that trait, so does Megaman. This FPS interpretation takes that aspect to the next level.
One important distinction that should be made, especially when dealing with RPG folk. The twitch genre is vastly different than the adventure genre. Unreal is a freaking twitch game, the less you think, the more your animal instincts come afloat and the better you play. Twitch games are meant to be played with the primitive brain. Sure there is strategy involved but at the highest eschelon, its reaction time akin to racecar drivers. i consider myself a decent twitch player, whos greatest skill was achieved at around the 16 hour mark of a quake tourney. Upper brain functions where shutting down and reflexes were lightning fast. Nothing beats mouse+keyboard for speed and accuracy. Sure a console controler has a faster learning curve with its 10 buttons but when you have 28+ keys ready to fire at an instant's notice with turns coming off of a gradual acceleration Lachesis flick is no contest.
That's why twitch games come in all flavours, from user friendly goldeneye to get a B.S. degree Counter-Strike.
Adventure games I can only imagine come in similar ranks, since my experience has been lacking as of late. Bioshock was a game that takes a few seconds to get the hang of, and was great fun. WoW takes a friend to guide you or an hour to get hotkeys and classes arranged to kill a rabbit.
Point being, it is kinda wrong to compare twitch games vs adventure games. It's like comparing Mario to Battle Toads in a battle for side scrolling supremacy. Their inherant natures are just too different.