I'm more of a fan of outdoor photography, but I admit that some shots of store interiors or homes are very eye-catching.
I'm a big fan of nature photography, everything related to it, flowers, landscapes, animals and all this kind of stuff, but it's true what you say, sometimes the beauty and life of a good photo is not always in the outdoors.
Nature photography is a large part of my portfolio, but I like to try other genres as well. What you don't try, you don't know.