#11 is very clever, with the reverse image being a fancy lamp. I like that.
#6, while being very inventive, will definitely not be attracting female clients! I do like the overall design, but the silhouette is too racy and implicates a different business service all-together. I like the inclusion of the chair and artwork.
#8 is exactly what I had in mind with the chandelier in black - good job! I would want to see a fancier font.
#5 and #7 don't quite contain graphical representation of interior design, so viewing them leaves me with the impression of something more related to jewelry making or women's clothing. However, I like the other aspects of those designs (color, style, artwork).
#2 is growing on me: simple, elegant, easy to understand. It's a contender.
This is getting good! I am enjoying the creative process and think contestants are on the right track. Thank you!