AUGH, the site ate my answer! Trying again.
I second mojitos! My favorite is a Hpnotiq mojito. It's like a regular mojito, only with a smokey blue color and a lovely fruity taste (X-Rated works too).
First, whip up some simple syrup (stovetop, sugar and water, 1:1...a cup of each is good). This dissolves in a cold drink much better than granulated sugar.
Drop 8-10 mint leaves in a glass. Add 3 Tbs syrup and muddle. Bruise the leaves, don't cut. You can use a muddler tool for this, but the butt end of a wooden spoon works too. Add 2 Tbs lime juice, 3 Tbs light rum, and 3 Tbs Hpnotiq. Fresh-squeezed lime is best, but I use the pre-squeezed juice from a plastic container because I am a lazy bum. You can also use Rose's lime juice, but there's a lot of sugar in it, so cut back on the syrup if you do.
Add ice cubes and stir to chill. Top off with a SPLASH of tonic water, no more. It's temping to bulk out the drink, but it will dilute very quickly if you're not careful. You can also replace the tonic water with champagne to make a "Royal" Hpnotiq mojito, not to be confused with a Royale with Cheese.
Enjoy your sweet, sour, fruity, chilly, sparkly cocktail!