Rum, whiskey, or any spirit i've had with diet coke/pepsi max/diet pepsi had no effect apart from making me a bit dizzy but wasn't sure if it was a hypo or not, so should be careful not to drink in large amounts if you had a long break from alcohol before, I had about 6 units worth of rum in one afternoon and since hypo and drunk/drowsiness have similar symptoms it's hard to tell, especially that I'd never been drunk before, but I felt it was enough purely because the room was blurry and shaking around when I wasn't even moving.
Wine on the other hand gave me hypo's, especially medium dry white wine which enabled me to eat without injecting insulin.
Vodka/Mixed drinks like the wkd mixed fruit drink were things that sort of balanced the carb content and alcohol so I could drink it without taking insulin also, so essentially it was just a sugar-free drink, or it may well be that my own insulin would be catering for it as my body could still be producing it.