Kopikatsu said:
I have the most trouble with that last part. Call of Duty is not a twitch shooter by any stretch of the imagination. You have far too much health for that, not to mention the 'dying' state they give you. Also, twitch shooters tend to be far more tactical than you seem to give them credit for. When you die in 1-3 bullets and people tend to roam around in packs, you can't Rambo your way into anything or you'll get swiss cheesed almost instantly. Twitch shooters tend to be around setting traps and picking off those who break away from the group. (Sticking a mine on the inside of a doorframe is always entertaining.)
Anyway, notice how I didn't ask for an MMORPG that was a twitch shooter, but asked for suggestions for each genre separately, since...you know...there is a difference. Basically, your comparing a twitch shooter and an MMORPG is silly. They're totally different things and can't be compared. (Unless there is an MMOFPS with levels and gear about equal to what you'd find in a MMORPG what have you.) As for everyone being equal in a twitch FPS...is that bad? Is it so terrible to not be able to totally dominate someone simply because you have a better 'class' or gear than they do?
Not like GA is such a fantastic game, but I forgot to mention it has a leveling/talent tree/gear system similar to most MMOs, straight down to the green/blue/purple item designations. But it's not a twitch shooter.
That said, instagib in UT/Q3A(QL) is pretty much a twitch shooter with interesting movement.
http://forums.gametrailers.com/thread/twitch-shooter-/886495
Similar thread here, and most people are saying what I said. UT, Q3A (or QL these days).
http://forums.gametrailers.com/thread/twitch-shooters/1001530
And there's another one, except it's more like the 2nd page is people laughing at some dude who thought Halo 3 was twitch (lol) and people who never knew the genre. That said, it's kinda "sad but true" how they phrase it. Except they think UT3 was a twitch shooter and it...kinda wasn't.
It really depends on how you like movement. However, in 1v1 duels, and even team arena masters /// clan arena, UT2K4 and QL are not really twitch shooters. UT'99 and Q3A I think are, and Q3A's CPMA mod might be just the thing you're looking for.
Skip exactly 1 minute in if you don't want to watch the intro. Also, feel free to mute the video and replace it with your own music. But it gives you the idea of the gameplay. Hope graphics aren't too important to you though.