Carpet & Safety
All, the subject of carpet (like many other boating related topics) can take on a world of its own with all available options but the single most important thing to remember is safety. As beautiful as those teak & holey soles are, they are very slippery and dangerous. While it is unfortunate that we even need to cover them, there is an approach that worked well for us on all our trawlers - 2" reveal. The 2" reveal is basically wall to wall carpeting less 2" along all edges using a rubber back carpeting. This approach allows the safety (no slipping) while still enjoying the teak & holey soles. Just find a good interior designer who works on boats, and you should be safe. We used Jeddy's Interiors in Dana Point, CA who does many Nordhavn's and is well respected.
The other nice thing about wall-to-wall carpet is depending on the color, it can soften / brighten up the interior due to all the wood. Matching the carpet and window coverings also provide a custom touch to the boat.
For all interior steps you will definitely want rubber backed carpet and use two-sided tape. The only true method of matching all these pieces is with a custom approach. All pieces of carpet should be bounded to prevent any unraveling in the future.
For the day head in the H38E we had carpet installed and knew it could be lifted up if anyone used the shower. We also had extra pieces cut to size and used them as floor mats at the salon and PH doors to protect the carpet below. We even had a few custom pieces made for the engine room door which allowed for items to be placed on without scratching the ER floor plates.
If you really are into carpet you can also consider a large custom fit piece of indoor / outdoor carpet for the aft deck area. While this sounds appealing, we found it to be a waste of money on our first Nordhavn and did not repeat it on other boats.
One item we did add to H38E was a nice dropdown sunshade that you could see through. This was a great help during sunsets and to keep the saloon cooler during hot summer afternoons.
Hope this was helpful.
John