**Enemy team AI**
I would like to see the Strogg have more intelligent moves than just ducking a rocket.  The strogg had advanced technology and weapons but favored the bumrush strategy.

**Environmental interaction**
Quake 2 started using more interaction with consoles and discs and such.  I would like this aspect furthered by having details such as little lcd screen or multi-part switches.

**Quake 1 incorporation**
Slipgates, sound effects, and death traps.

I want Duke in it. They'll probably beat Duke Nukem Forever with their release time.

1. Destructable terrain.  (kinda off, but I've always wanted to leave a big hole in the wall with my rl.)

2. Enviormental setting/maps like the mission in Ghost Recon, where you escort the tanks in a russian city.  I love that mission.  It maybe just me, but I think that has been as real as it gets. Good idea, too maybe return to wartorn Earth for this.

3.  Hope that I'll be able to play it on this machine.  Dunno, but the Quake series, when released has always set the standards for pc gaming.  Most videocard manufac.  benchmark their stuff on the latest quake game.  *cringe*

I would like to be part of a real war scene ala moh:aa. Where the strogg planes fly over, lasers shoot stuff on every side, ... you know what I mean

Realistic physics.

In Quake, you may be using improbable weapons, but they should behave - believably improbably?  

We have the processor power now to incorporate something like bullet drop and complex penetration in Single Player gameplay.  I don't know about MP, but at least having the code there in Q4 would be awesome.

Unlike other Quakes, we're not talking about an engine being built here - or so my understanding goes.  The spectre of a Quake game licensing an engine feels wrong.  Quake is segment-defining not because the games are any good - they aren't, or at least they haven't been - but because they lay a technological foundation for the future.  I am sure Raven will do their customary sow's ear-silk purse job on working with the engine, but... something is wrong.

I do admit that was the first thing that struck me, but this is also the first time a Quake game has been outsourced, period.
It's not an id project at this point.
I'm hopeful, however, although I seriously doubt the D3 engine is going to be any sow's ear.  *grin*
Perhaps they'll make a Royal Entourage out of a Silk Purse.

NC

To be better than Quake 2. Unmodded I just couldn't stand to play that game.

I'd like to see GHOUL technology used in Q4. Since the strogg are bio-mechanoid, gibs would be a mix of metal shards, broken tubes, muscle and blood. Have armor damage be more realistic. Steal the bot code from UT or improve on the Q3 code (In UT, the bots just go about their business without your input. They defend, attack and cover. In Q3, they just stand around waiting for you to tell them what to do)
Also, It'd be cool to see your dead friends come back as stroggs, since they recycle human parts. And have a level in one of the strogg processing plants to see the way they put them together.