The important consideration for me is the type of shooting a person has in mind. For hobby work I think the list here is pretty much complete.
If you get excellent results with the 150mm macro lens I wouldn't bother with a 105mm macro. Giving up a good chunk of working distance in return for what, I'm not sure. I do really enjoy shooting with my 105/2.8 micro and I wish I'd kept my 60/2.8 micro. Of the Nikon lenses I've used I'd say the medium distance shots I've taken with that 60/2.8 micro had the most pleasing and smooth out-of-focus feel. On the other hand, full 1:1 shots with the 60/2.8 leave you just a few inches from a subject. It's great for copy stand work.
I have both a 50/1.4 and an 85/1.8. I think they are so close in focal length as to make the 85mm unnecessary with digital capture. I find my 85/1.8 is a great lens on digital though and it's fantastic on film.
In terms of upgrading I'd probably look at trading the 14mm for a Zeiss equivalent.
I'd consider doing the same with the 50/1.8. I traded mine for the 50/1.4 because I just wanted results which were less clinical in nature. The 50/1.8 is a super-sharp lens whereas the 50/1.4 speaks "Nikon of the ages".
As for all other types of shooting, I suggest a short zoom to add to the list. The 17-35 and 24-70, 28-70, 35-70 zooms come to mind. And with the ISO ranges of the current cameras, I'd really consider the current 24-85 VR G-lens for a great travel lens.