summer cocktails - the english mojito

The facts are these:
I'm mostly a wine drinker. And I don't have a green thumb.
I don't regularly drink cocktails. And I have managed to kill two rosemary plants.
When I do drink a mixed drink, I like gin. And fresh mint is apparently immune to my brown thumb.
Take all of that into consideration, and my new favorite cocktail makes sense - the English Mojito.
Mojitos have to be one of my favorite ways to use fresh mint (a good Tabbouleh, not withstanding.) But I prefer gin to rum and recently found myself in posession of some very nice garden-fresh cucumbers. And so the drink above was born (its origin, I'm not sure. Google presented me with the idea).
If you're not a gin fan or haven't found yourself with a plentiful supply of cucumbers and mint, then check out these other Healthy Cocktail Recipes from Cooking Light for summer sipping inspiration.
Curious.... what's your favorite summer cocktail?