I love fluff. It distracts me from the grim reality of EVE. I like the fact that CCP is always improving visuals, and I think more canbe done.
Here is what I think

-Keep adding to Incarna: Like a lift to a promenade and a station bar, just as shown on the videos years ago. This is a more personal way of interacting with others and won't detract from spacewar. Me thinks. [url]http://www.youtube.com/watch?v=n41s1Iox18A[/url]

-Separate UI art for different menus. i.e. Orthographic views of ship fitting highlighting the modules locations. Rotating XRay image of your body with your implants location etc.. A full image of blueprints in the case of manufacturing. The last eve ship competition had fantastic examples:
[url]http://browse.deviantart.com/contests/2010/eveonline/?order=24&offset=24#/d2yqw7d[/url]
The manufacturing window can look like that.

-Ship's Internal Camera drones: With a view of the main bridge or cockpit. With some kind of functionality. this could give way to joystick functionality in the future. Might be fun.

-Damage model for ships: Could just be a few plates dangling, texture replacement or twisted parts.

-One generic texture for stars?. Now that we can park right in front of them. Or maybe just melt our ships if we travel too close.

-Are there any other Galaxies we can see from New Eden? If there are, apologies. If not, would be nice to include in Backgrounds.

-Proper flying paths for ships around stations. To avoid going through the station itself as if it was transparent. That coupled with an internal camera view, can give a nice 3D feeling. Me thinks.

-Camera drone in default mode or pilot view when undocking. Will add some feel in inmersion. And talking about undocking. Stations should have more gates, to avoid jams like the ones in Jita. At least the trade hubs.