I'm in the same position as an artist... as a viewer, though, I find that I almost always click the 'All' category when looking through other artists' galleries. My memory takes days off occasionally, and I forget which categories I've looked through... (I looked at landscape, seascape... wait, did I look at seascape?) and I end up going back and forth a lot.
I like to compare the way an artist handles a landscape to a still life, for example, so it's nice seeing everything mixed in together... and it's intriguing to see the mix of subjects that people are drawn to paint.
And sometimes you come across beautiful paintings of things that you might not normally be drawn to. If an artist's gallery is divided by genre, for example, I'll look at landscapes and still life paintings, but I might not look at animals or people. If all the work is in one place, I find myself looking at everything.