It's weird, I'm not too interested in the horses that will be in Skyrim. But when it was confirmed that you could ride them, I dreamt about it that night. It was strange... I was in this village from the trailer where you can see a horse, and kept thinking "oh right, you can mount horses, I should try that out", so I rode with that horse around, and it had a very distintice red saddle and chestnut brown fur. Then I came to a meadow where there were free-roaming horses, and... they all looked exactly like the one I was riding, including the red saddle, and I thought "Well that's really lame. Free-roaming horses wouldn't have saddles!"
Then I started thinking about how that must've cut development time and it wouldn't bother me that much as I wasn't interested in horses too much anyway... then the dream went to my real life and I was working on my bachelor thesis. (That part svcked.)
Also back when I was playing Morrowind on my crappy old computer, I wasn't able to use the pixel-shaded water because my graphics card was too bad. I was really impressed by the screenshots of the game and always wished I could enable that awesome-looking water. Then one day, I dreamt that I was swimming down the Odai river, and it had waves and the most beautiful reflections ever (much better than the actual ones), and I went diving and swam around and just enjoyed the beauty of the scene. Needless to say, I was very disappointed the next time I played the game.
The funny thing is, by now MGE shaders look exactly like the reflections in my dream, including the waves. I am soooo happy with Morrowind now.