I've been having a lot of fun with Aerofly FS2. It's really a fun alternative when you want to just fire up and fly around without a lot of preparation time and without worrying about fussing with tweaks and such.
Everything shown here is default, with no tweaks or modifications (to the sim or the images) with the exception that both planes feature a repaint which is available online, with the exception of the King Air which has a repaint that is still a work in progress but will be available once completed.