Being permanently curious, I usually keep a couple of side projects going. Some are pretty basic, other more elaborate. Can't say I finish all, or even half of them. In the end that is probably a good thing. For hobbies, it's not the goal, it's the road that takes you there which is the reward.
These are a couple of examples that I find myself returning to off and on lately.
- Use machine learning for arty selfies
- Take picture, pick artwork and see the result
- In-browser transfer-style neural network!
- Try it online!