Hi tomas!
Somehow I missed this thread, sorry..
What can I say? It seems to me like you're making the first steps with Indigo. Which modeler are you using, by the way? it is always good to know, for the experts of THAT modeling package will help you best
I like the toilet shot most: it is a test, that's sure, but even as a test it has a good charge of irony. I think I get that from the central perspective, usually giving the photographs sort of a monumental sense. So basically you're giving some kind of tribute to a WC
The radio render is good, but it has too much postpro to evaluate the real goodness of the original image. The final product is nice, by the way. The wardrobe image has really good materials and textures, all works fine. The cupboard is good too, maybe the sadows make it a little flat at the moment.
I was thinking why not to put some objects together and make a very basic interior shot. I think you could get something more out of these shots if you assemble that.
Simple studio scene, blue light on the left, yellow light on the right, and you could get a good interior!
Keep testing!