I believe one of the best design elements you can add to your log home are decorative log beams or log trusses. When people visit our log home, they first notice the logs running across our main living area (and then they notice the log staircase.) We purchased 2 pairs of decorative logs and are going to use the 2nd set in the basement. We added extra courses to our basement to have the high ceilings and then will continue our log home theme there. What I'm thinking about doing in the future is adding some hugging beams to the ceiling of the loft wall.
There are a few fellow log bloggers that have decorative logs that I just love. Check out Dianne's loft ceiling at Schrader Landing - her project is certainly coming along. Terri has some very handy people too at Steel Magnolia . When I see their projects it makes me wish I added even more decorative logs.