My favorite is a "whisky kit" Thailand style. That's a pint bottle of Sangsom rice whisky (tastes like good rum), a bucket of ice, two cans of coke or diet coke, and a couple of glasses. Mix Sangsom and diet coke at your leisure. If you're partying, they give you two 1L fanta bottles with the tops cut off. Fill each one with half the ice, a coke and half a pint of Sangsom, and you're ready to roll.
My normal cocktail of choice is whisky and diet coke. There's too much sugar in regular coke to be drinking it all night long.
When I get a little tipsy, I start playing mad scientist with the bar supplies. My last frankenstein concoction was named "smurf piss":
diet rockstar energy drink
vodka
blue curacao
lime juice
The booze gets chilled in a martini shaker before being added to the rockstar and lime. Served in 19 oz glasses. Actually pretty tasty.