I can only imagine what a cucumber would be thinking if it was reading this thread.
Still, in the grand scheme of things, it's really between the limes and cucumbers to work out.
@trichophilia I am a little off put by the suggestion that this scenario omits tonic, or includes cordial.
Cucumbers, as it were, are a subtle vegetable*. Less inclined to be quaffed around in bars that have shooters and cowgirls, more likely to be spotted in a coastal setting on a private verandah.
Yes - the cucumber is the well off retiree/play-cucurbitale of the plant kingdom. Or would at least like to be drunk like one.
The lime is the fun one that ends up in everyone's drinks, but nobody really minds because, hey, you want that lime in your drink too.
In conclusion: on the spectrum of sociability, the lime is the extrovert and the cucumber the counterpart.