“The more the merrier” would be a common answer. But there’s a way how to mention them for best results. From my opinion, I’d suggest the following:
- Pick 2 projects where you’d flaunt your skills. Remember, it’s not F1-score that you should flaunt, but the approach that you took to make it best, and that you are interpreting in a non-biased way. You know how to handle missing data, feature engineering, and data imbalance, will make you look more stronger.
- List out other projects in brief, suggesting what business outcomes you achieved