I drink a gin and tonic at least every day. It must be served in a tall glass half filled with ice, plymouth gin and tonic that's on the cheap side of decent, and a chunk of lime lightly squeezed and wiped round the rim. Though these days i've gotten lazy, and if i feel like more than one, i'll just have an extra big g&t in a pint glass.
I cant understand expensive tonic, I find it often tastes artificially citrused. Better off with a good own brand tonic that actually tastes like quinine.