Non-alcoholic:
Pretty much anything, really, but my go-to drinks are tea (hot is nice, but most often iced)/coffee (hot or iced)/juice/soda water.

Alcoholic:
Most of my favorite drinks are cocktails. However, as far as standalone alcohols go, I really like Framboise (it's probably the only beer I like, probably because it doesn't taste like beer at all), ginger beer (can one even classify that as beer, it's basically alcoholic ginger ale), and strawberry honey wine.
As far as actual mixing stuff goes, I will probably like it as long as there's no gin or whiskey in it. Can't stand the stuff. Vodka and rum are my typical bases, and I also like whatever liqueurs I can get my hands on as well (Midori and Chambord are both fantastic). Also triple sec and Chambord Vodka is nice as well. As long as I have stuff like that I can typically make something super nice.