I've enjoyed coffee that was roasted with cinnamon. I've mixed in cinnamon with ground coffee myself (in the upper part of the espresso puck only) for a similar effect. Tastes great. Would recommend.
I've had coffee with orange juice, which was weird but ok.
As long as you mix in good ingredients, you get something good, that individual taste would judge if it's likeable.
After all, what's so objectively likeable about bitter bean juice in the first place?
Consider a compromise between traditional espresso machines and button to cup ones, in the form of Breville Oracle. It's only a bit more effort than just a button, but what you get is better coffee than similarly priced automated machines, the opportunity to use it as a traditional machine if you wanna, and the ease of cleaning.
If you wanna achieve 9 bars of pressure with a constant coffee beans amount and varying beans type (medium roast, dark roast, different varieties within the same brand, etc) you will need to finetune the grind size setting quite a lot. Even tiny grind size differences have a big influence on your brew.
Turn on my Lelit Kate, go take a shower, weigh 24.2 grams of my locally medium roasted Arabica beans, grind with a finely tuned grind setting (to get 9 bars is pressure), comb a bit and give it around 8 careful taps to get a level fluffy basket. Tamp it hard, with the priority being to stay level. Put a steel mesh on top, drive it in, push the button and wait for 27 seconds as the 2 glasses get a significantly caffeinated and flavorful coffee. Add some whole milk and ice, and serve to me and my wife, with a Belgian waffle or croissant.
Blend it. Yeah it might result in an unpredictable result as I haven't tuned the grinder settings for it, but it's still good.
Shame on you for not guessing which 3-letter acronym was used! /s