Alien Invasion: Happens a lot less often than you might think. Seriously, planetary invasion across interstellar distances is Really Damn Hard (the number of units in the field you need to control and occupy a planet populated by billions alone is pretty astronomical, even if they are all self-replicating war
The good thing about being self-employed is that when you can’t sleep, and have finished your book, and played every game you own, and fiddled with all of your apps, and come to the End of the Internet, you have the option of getting up and do something useful.
Scary Dogmatic Aliens: Mostly averted, inasmuch as despite all the wide intellectual, cultural and biological differences between species, most of them aren’t blessed with an overwhelming urge to bring it forcibly to the rest of the universe. Well, no more so than, say, 21st-century humans, anyway. Played straighter by,
Alien Sky: Well, yes. Particularly of note: Eliera’s weird not-a-horizon on account of being just flat enough; the cool accretion-disk effects of Mírlan, which has a pulsar in the same system; Revallá, which is a gas-giant moon and has that in the sky; Galáré’s planetary ring; the double
Lions and Tigers and Humans… Oh My!: Courtesy of uplifting and theriomorphic bioshells, albeit not hugely common.
Alien Arts Are Appreciated: There is an entire industry involved in selling the ultratech equivalents of opera glasses necessary to perceive the really alien arts, and teaching courses in their proper appreciation. Which may, under some circumstances, involve having new perceptual routines, background information, and indeed, gnostic overlays containing entire
Lightning Gun: Electrolasers. Commonly used to stun (which is not as harmless as it might sounds, because, y’know, high voltage doesn’t just stun) and to screw up electrically based machinery. Work on actual physical principles, involving laser-ionizing a path through the atmosphere for the electricity to be dumped
Airborne Aircraft Carrier: Enter the aerospace cruiser, a sub-class of assault cruiser specifically designed to get low enough in orbit that aeronefs and mostly-air-breathing vehicles can sortie from it – because once you’ve captured the orbitals, air supremacy may very well be the next stop in the orbithead-to-ground maneuver plan.
The Library of Babel: The Repository of All Knowledge, which arguably is the Empire’s equivalent of the Library of Congress, except that it’s been around for long enough – millennia – that it’s also the unburnt Library of Alexandria; and is available to the general public, under the conditions
AI Is A Crapshoot: Deconstructed. Actually making regular AIs is pretty much entirely safe. They aren’t any more likely to turn evil or go crazy than any other person. The problem comes in when the manufacturers try to raise them as slaves, treat them as slaves, or hard-code a
Least Common Skin Tone: Firstly, there are no humans. Second, if they ever make a live-action version of the Eldraeverse, just to make sure that all the other special-effect characteristics don’t get ignored in pointing out, y’know, only very distantly related to humans as we know them, they’
Learnt English From Watching Television: While it’s not nearly as simple as that – as mentioned above under Aliens Speaking English, there are no universal/self-teaching translators – people’s EM transmissions, and indeed Internet, if any, are one of the places from which those highly skilled linguists get the information