DO WANT, then...if I don't have to deal with recurring fees.
The underlying engine does sound promising, however. Maybe it can form the basis of my dream game one day-the seamless space-to-planetside transition is very important.

Yes yes, bisexual, that's really important to me XD

/Salute!
Spoken like a true man!

I would buy Warren Spector's existence and fund his projects forever, and buy the rights to Deus Ex so he can make a proper PC sequel, at least. I might get a bunch of other great writers together to help.
I'd also make Ken Levine disappear.
I'd also force the 2001 Duke Nukem Forever build to be released, because it looked SO AWESOME and wasn't it almost complete anyway? We need more games that run on the Unreal engine. NOT TO GO OFF TOPIC HERE.

Ken Levine > Todd Howard....

My dream games are:
A real adventure game, a police investigation for example, in a huge 3D universe where the player would be totally free. Unfortunately, engines like GTA's are almost always found in action/arcade games, which is a pity. I know there are some exceptions, the best example being for me The Nomad Soul. I wish there were more games like that.
A rather basic RTS game such as Warcraft 2 with gigantic maps. I mean maps the fastest units would need dozens of hours to go through. I find it very frustrating to build an awesome base, complete the mission and start from scratch in the next level. In this game, there would be one single huge map that you would explore and conquer progressively. Stress would be laid on moving one's troops/goods and chosing the right locations to position one's bases. This would enable to have more global and long-term economic and military strategies.
A game with no aim but having fun. The action would be set on a tropical island like that in Just Cause. The player would wander freely and come across hundreds of wonderful spots to practice extreme sports (bungie jumping, base jumping, scuba diving, windsurfing, snowboarding...) and to test drive cool machines (ATVs, speedboats, motorbikes...). The environment would be varied and filled with a colorful and lively fauna and flora.

I haven't tried this source mod yet, but i've heard some good things about it and i was going to check it out at some point... its multiplayer space combat between two cap ships with some fps action when boarding the enemy ship or defending it.
http://en.wikipedia.org/wiki/Eternal_Silence
anyway, if i had to make a game (excluding the awesome space combat ideas already on here), i think a Thief type game set in modern day would be awesome, maybe with some more rpg'ish elements. It'd be fun to start off as a regular burglar and breaking into people's homes and stealing things (trying not to get caught) and gradually get better at hiding, disarming security systems, spotting cameras, acrobatics/scaling walls/buildings, breaking into safes/vaults, etc. as you move up your way in the crime world you'd start doing things like convenience stores, malls, and eventually near the end be breaking into large corporate facilities, government buildings to steal secrets and other highly valuable things. It would be a large open world like GTA, but with thief/MSG gameplay. I guess you would also have the option of going brute strenght route, like holding up a bank or convenience store with guns, but there'd be heavy penalties for getting caught/being seen and having a warrant out for your arrest (assuming you were ID'd, wearing masks could nullify the risk... just don't drop any items at the crime scene!). And as with Thief, combat would actually be very risky and you would want to avoid it as much as possible

Very true, very true...
Bethesda needs a good kick in the genitalia.

My dream game would have to be an RPG/FPS (or TPS) with adventure game elements based on The Dark Tower book series with major emphasis on the story.

Gee. I think I'd have to give every bit of my funding to sheepdragon. :)

Jedi Knight meets Deus Ex.
My ideal game would take the best elements from the original Jedi Knight (not the sucky sequel) and mix them with elements of Deus Ex. You'd be in a more open-world version of the original star wars trilogy, you'd be able to choose your skills and specialities (weapons, melee, force, etc..) and customise weapons. Play the game as a Han style merc with overloaded pistols, or as a stealthy jedi, or whatever.
Lightsaber combat would be a little slower and more like the samurai combat from the original movies... and it'd use wii motion-plus controls. (Red Steel+Dark Messiah+Riddick+Jedi Knight)
and it would have nothing from the prequels.
Batman - The animated series
GTA style open world. Cell shaded with the art style from the Batman Cartoon. Driveable batmobile, bat-boat, bat-bike, bat-jet etc..
Lots of random events and combat, but the game would be much more "detective focused" than any GTA games. Instead of simple A->B missions, there would be clues and crimes semi-randomly occuring arund the city, and it'd be up to you to work out where to go, what the clue meant, when and where the crime might take place, etc.
Middle Earth (LOTRO Offline) with an AI director
A true CRolePlayingGame (as opposed to a CRPG) where the players have freedom to come up with whatever solutions they can to probelms, and the AI reacts by trying to creat interesting and challenging scenarios.

Put Tim Scaeffer and the guys from looking glass studios in a room with lots of cash.

I would just grab Chris Avellone, Tim Schaffer, Ken Levine, Tim Cain, Feargus Urquhart, J.E. Sawyer, John Carmack (mad coder FTW), Warren Spector, the version of Richard Garriot that developed U1-U7 (not the U8-U9 version because he was launching himself into MMO land by that time), the guys from Introversion, Jeff Vogel (because he can write) Vince D. Weller (why hello Age of Decadence), some of the better Obsidian folks, the guys from CDP RED, the Bullfrog dudes, and then lock them up with food, computers, software, cash, and pray to whatever deity that may exist that they produce a title (or titles) that would be pure awesome.

My dream Sci-fi game would not have the objective to destroy all other spaceships, but rather to explore and trade goods and services in a galactic commerce environment. Throw in some natural dangers (solar flares, plagues, meteors, earthquakes, etc.) and the adventures with treasure hunts, cures, and new alien friends to keep the drama and excitement levels up and then you have my kind of GAME!
Consider the success of Starflight 1 & 2 as a hint of new possibilities when combined with a more robust merchant trade and services algorithm...

A REAL successor to PS:T.
Knowing what happened after the events of PS:T.
*** WARNING SPOILERS ***
I'd really like to know whether Fall From Grace and the others managed to find TNO (who at this point actually is no longer nameless) in the Gray Wastes and whether they were able to free him.