Maybe as you get older, you crave bitter things. That and the fear of the diabeetus monster. Artificial sweeteners can also cause health issues. That said, a quality blonde roast coffee can be pretty nice and not too strong.
At least where I live energy drinks are cheaper than coffee (unless you are drinking shitty instant coffee) plus while I do like how coffee tastes like it is a lot less appealing than then sweet tropical fruit flavored energy drinks
Please don't tell me you're one of the people who drinks almost all of it but then goes -OK I'm done, try not to look at that very obvious amount of drink I still have in my glass-
That's what my bro does and it's real bad for cleaning the dishes...