Currently in our drinks cupboard we have
Portobello road
Star of Bombay
Tanqueray no. 10
Sipsmiths
Berkeley square
Hendricks
Caoruun
Ophir
My favourite remains Bombay Saphire, I like the botanicals in it and the smoothness. My other half thinks it has a background taste of soil, rather earthy, but I don't find that at all. His favourite is Tanqueray No. 10 which I find too strong and a bit harsh. Star of Bombay is nice, and portobello road is very acceptable. I dislike Hendricks, the taste reminds me of the smell of privet hedges. Ophir is a spicey gin and they recommend a slice of chilli in it instead of cucumber or lime, which I quite enjoyed for a complete change.
Aldi do a prizewinning gin, the name of which escapes me.
I'm looking forward to trying the Rock Rose one you mention Islay :)