I paint different things. Whatever grabs my attention at the time is what I paint. Many artists specialise and paint similar things constantly. There are many advantages to this method and if they sell it’s money in their pocket.
When I have an idea I often search it on Google. I’m a little disheartened when I find an artist who has painted many paintings around the same idea and often better than I could have done. The moral of this story is to not search; just create. What I do will not be the same as another artist. It might be similar but not the same.