Making a 3D tour relevant to your niche market basically boils down to knowing who your audience is and what is important to them.
For example, say your client is a realtor, and your target audience is made up of homebuyers. The subject of your 360 panorama is a kitchen in a home your client wishes to list for sale. The kitchen features a dishwasher, and you know that this is a major selling point.
If you don’t visually capture the dishwasher, a prospective homebuyer may have to call the listing agent to ask if there is one present in the kitchen. An effective 3D virtual tour will make the presence of the dishwasher abundantly clear while an ineffective tour that does not display this information could cost time (and money) for all parties involved.
When choosing a location to set up your camera, make sure the details that would be of interest to your intended audience (in this case, the dishwasher) are plainly visible.
When creating 3D tours, always remember the purpose of the shot and the value you wish to communicate with your audience.
In general, avoid panoramas taken from the corners of rooms, instead, focus on what your audience wants to see. Move the camera closer to the point of interest.