mojito with vodka? ick. always make with white rum, preferable 181 if possible. failing that even gin works better than vodka(though this might be a personal thing as i really like gin and tonic with lime and gin sours and greyhounds and pretty much anything with gin). margaritas are also nice and are pretty simliar, tequila, triple sec and lime. tequila shots with tabasco are crazy fun
other favourite is black russian, vodka+kahlua+coke, though coke is optional