u/Available-Alfalfa-79

I just started Futari wa Pretty Cure, the very first series, and I intend to watch each series in their release order. So far, I'm really enjoying the first series.

I have three questions.

First, out of curiosity, which series do you consider the best?

Second, when would you recommend I watch the different movies for each series?

Finally, can you tell me anything important that I'll only understand after watching the series? (I find it interesting to revisit the series once I've seen them and understand references I missed before.)

Thank you for your time.