Outside of homebrew AND commercial beer, you mean?
I also love a good single malt, but I wouldn't call The Macallan a favorite (although it's not the worst, either). My current favorites would be Lagavulin 16, or Laphroaig Quarter Cask on a bit more of a budget. Balvenie DoubleWood is great too.
Also like Ireland's answer to a single malt, Redbreast.
I also like tea. Most any varietal. Lately it's been a few Scottish blends (if you can describe a tea as "malty", these are the ones). I've been craving Lapsang Souchong lately but haven't gone to get any more. And I keep various Mate blends around (since I prefer em to coffee and they pack the same punch). Moroccan mint is good. Mango Ceylon or Ginger Peach, too. I've got an Assam with chocolate blend that's really good. Earl Grey with lavender that's fantastic. And a jasmine silver needle that's fantastic. Among others.