Just a matter of opinion, take the types of games you like to play and think of the things you wish they did, or that bug you, and use that. There are certain things that I love about certain genres of games, I am taking those ideas when making my own as I feel I can either improve on them, or entertain someone with a new adventure using them. Or if I have a genre that I play where I don't like certain features or how they are implemented in games, I take that as a challenge on how to do it better and improve upon the existing standards.
Playing games doesn't always mean you will love making them. Some folks love to make cars, some like to race them. The main thing is to have fun. If creating games is fun to you, then do it. If not, just keep playing and have fun with it that way!