My internet is bad. I would prefer if every time I lost signal, ten error messages didn't pop up and obscure the field where I'm trying to type. It's distracting, and I can't see what I'm writing.
If there's anything natural element that looks like it's been made by an advanced alien civilization, it's crystallized bismuth. Seriously - it's like the fairies that used to live in mushroom circles now live in a post-singularity society.
I don't really like complementary color schemes that much. Yellow and purple don't look good together to me, except if done exceptionally well, red and green are too associated with Christmas, and blue and orange are far too overused by every movie poster ever.
However, *complimentary* color schemes are very good.
Red: You are looking beautiful today! Blue: Why, thanks Red! That cadmium pigment looks great on you!
I like to think that when the robots become intelligent and take over the world, they'll share a bunch of cute Roomba memes over the hive-mind, like we do with cats.