There seems to be a bit of itchy feet going about.
From my experience once you are locked into a role it is next to impossible to break out of it without the need to move onto an other company. Its sad that your company isn't interested in developing both you, 3D and their company further.
As to what to put into your portfolio. You cant go wrong with a mix of commercial and residential projects , interiors and exterior. If you want an in-house job then have more conceptual style images. If going for a high-end job the only the best of the best of your work. Its better to have a small selection of quality than a whole heap of inferior stuff.
I am at the other end of the spectrum. I am tired of doing "SK to DD" 3D, I want to return back to the high-end, marketing wizz-bang work I was doing in London. I believe that there is a market for it in Brisbane, but the funny thing is that dedicated, quality archviz firms are rear as hens teeth here, as my searches have proved. I have steady freelance work, so I think it is a relatively short strep to go it alone. (Its the fear factor).
I too am putting my porfolio together so any suggestions (or job offers
) would be helpful to us both
JHV