I'm also a fan of the rich dark beers, and living in Montreal means there's always a great selection of beers at any bar worth going to.
When I'm trying to watch my calories though, I enjoy vodka, water, ice, and a slice of lemon when I'm at home. I find even the cheapest of vodkas get cut enough by the lemon so that it's drinkable. At the bar I'll usually just go for Jameson on ice. I find it's way more enjoyable than any other whiskey typically stocked.