If I'm drinking it straight, I usually good for a good whiskey or scotch. I also love Drambuie and Baileys.
Mixed drinks, I usually go for a rum and coke, or variations thereof.
Beers, I love darker stuff. Guinness is my favourite, followed closely by 1554 (it has a chocolate aftertaste!), Trois Pistoles, and a few others. Irish Car Bombs are fun on occasion, if I'm feeling trashy!