I dunno why, but I find myself always wanting to land on a dark runway with operational landing lights on my a/c.  So, yea, I'd like to see night come back even if just for 15 minutes.  And, LANDING LIGHTS!
More clouds, more weather would be cool.  Wouldn't rain and clouds actually IMPROVE frame rates?  I mean, there wouldn't be as much terrain to draw if you're in the pea soup, right?
Stick lightning flashes ...  ooooh yes.  
