deemery suggested -
Do a slate/shingle roof with a clerestory. That's typical for power houses and will provide a lot of roofline interest.
...hmm, not a bad idea...I was gonna just add a cupola or something....but Dave makes a great suggestion.....so I steal some parts from the main structure build, the cupola pieces....and you will need to get some windows from the included sprues....I also have plenty of RDA stuff in my parts bin, so I have plenty of parts...but if necessary, I am sure a call or email to Matt or Carole and you can purchase whatever you can think up....
...I start by making the gables for the clerestory for the cupola parts....