I can't say I have a lot of experience with game dev specifically (I am an experienced software developer but I'm new to developing games). But I think that at this stage, what's most important is that you keep growing and learning, and in order to do that, you should work on whatever motivates you the most.
If you prefer challenging games (like me), then keep making challenging games. A lot of players like a good challenge, just look at how popular 'Dark Souls' is. You will have to get experience in order to make gameplay that is both challenging and fun, and there's no better way to do that than making more challenging games :)