You might find this FAQ helpful - particularly the short video:

It's down to personal preference in the end, but that looks nicer to me.

Don't worry too much about what other people (including me) think and say if you feel it needs to be more obvious/darker than that.

Fantastic! Congratulations to the winners and well done to everyone else :D

I think you should do what you want to do.

If you are anything like me, I start something, then realise I should have done it some other way, restart it the other way, then realise it was better the first time around and go back to it. The best things happen by trial and error.

You could do that, or maybe you could use Change Properties on them all to make them a thinner line width?

You can find out how wide they are right now by using the pick properties eyedropper tool. The line width should then be shown at the top.

Then use Change Properties to make them slightly thinner.