My first XBOX game was Baldur's Gate: Dark Alliance, and quite frankly, I was blown away -- among other things -- by the graphics engine. Beautiful textures, superb lighting, anti-aliased-looking edges, detailed spell effects; and all this at a *perfectly* smooth framerate throughout the game. Not once did I feel that the framerate fell below 60fps. All this added up to an overall fantastic gameplay experience, inspite of the good but not-so-great storyline.
My second game on the XBOX was KOTOR. Nothing prepared me for the shock I received when the cinematics were over and the game screen came on. The framerate was horrible! The graphics were choppy, and every single edge was jagged and ugly! I had read the reviews, and they had all mentioned framerate issues, but I thought those reviewers were perhaps perfectionists who couldn't tolerate even a minute fps drop. I was wrong -- the drop is visible even to the most un-hardcore of gamers, especially during combat.
Don't get me wrong, I love the game. I've loved every minute of playing it, it's truly an epic. But the horrible graphics stand out like an irritating thorn in an otherwise near-perfect game. There are several spectacular effects in places, but those effects look like cheap stunts to take your mind off the ugly edges and choppy frames.
I sincerely hope that the Obsidian people (many of whom I believe were behind BGDA) work their usual magic and create a KOTOR II with smooth, fluid graphics and amazing framerates. That, combined with a KOTOR-style gameplay, storyline and voice-acting, is what would make one hell of a perfect game.