Hi @martine!
We had this post in the forum recently on if people let their candles go out on their own, snuff them or blow them out:
That may give you some ideas as there is tons of great information in there!
As for myself, I’m learning it’s more about the intention so I’ve used bigger candles and put them out (by snuffing or blowing) and reused them. When I put them out, I spend a moment thinking about what I was using it for or my intention beforehand.
But I second what @Nixi said - if it feels right, do it!