Trappist beers, mead or single-malt whisk(e)y.
No shortage of the former in Belgium with our rich beer culture. My personal favorites are Westvleteren, Rochefort and Chimay.
Mead is rising in popularity but still pretty hard to find locally. Luckily you can find anything online these days and I know a friend who brews small batches at home.
I like my whisk(e)ys light and fruity, not peated please ... and definitely not diluted with ice. Especially love the Japanese whiskys: Yamazaki, Hibiki, Nikka. But definitely don't mind Irish or Scottish distillery products either.