Non alcoholic is Irn Bru by a country mile. I drink about 3 litres of it per day.
That as well as White Grape & Blackberry Flavoured Spring Water.
As for alcohol there is a long list.
Beers: San Miguel, Brahma, Corona (with a lime), Estrella Damn, Samichlaus (on occassions, bloody strong though), Desperados (Beer and Tequila), Fruli (Strawberry flavoured beer).
Spirits: Vodka and Coke, Vodka and Red Bull. Preferably Grey Goose, 42 Below and Absolut.
Tequila shots and Jaegermeister are also favourites of mine. As are Jaegerbombs which I love.