What is the style of your house? Are you using an architect or designer? Do you have plans? What are you looking for in a roof?
If you want to take advantage of the solar energy potential there are photovoltaic roof shingles available. There are "living" roofs that can be constructed.
Metal roofing is long lasting and recyclable and comes in many different styles including a metal shingle.
Plus traditional asphalt shingles, EPDM rubber roofing, spray foam coated roof.
List goes on ....