Thank you so much everyone for the kind comments! I agree with those who think brunette is best ... my natural colour is even darker, so this slightly softer chocolate brunette looks more natural while also being kinder to my skin as I get older.
The blonde is fun though and I would definitely do it again - for someone who overthinks most things, I'm actually not too fussed about hair - it grows out/back! We'll see what choices I make as I gray - I wanted to try blonde because it's a bit kinder on re-growth (roots aren't as noticeable) ... but the bleach took a toll on my hair's texture, so I sort of robbed Peter to pay Paul with that one ...