Iced tea or coffee. They're lovely hot drinks for me but taste weird when cold.
Hot chocolate. Too sweet for me (possibly also why I don't like iced tea/coffee as they often have syrups etc and I don't take any sugar in my hot drinks).
Any fruity/herbal teas. I don't know what it is but I just can't drink them. I'm not even an Earl Grey or green tea fan. Just give me good old Tetley with a splash of milk.
Anything with artificial sweeteners or stevia as they give me headaches.
If I do want something sweet to drink then I'll have fruit juice or a Coke. I can't stand Pepsi but they've started adding sweeteners so that's off the table now anyway.
I love white wine but not any of the lower alcohol ones as they always end up too sweet and fruity and I prefer a dry wine.
I seem to have a theme with the drinks I don't like so much. I also don't tend to eat much in the way of sweets and desserts. I cut most sugar out for health reasons so having more than a little now makes me feel queasy.