If you put it on too hot, the coffee’s bitter. Don’t you mind bitter coffee?
You’d struggle to get the coffee from a stove top to be too hot – the method by which it works is evapouration of the water (which happens at a fixed temp of 100 assuming relatively low pressure) and it is then cooled as it passes through the filter/support arrangement and through the coffee, meaning that unless you’re vastly over-heating the base with some sort of mental heating system, it’ll be a very consistent temperature. I’ll measure it for you if you like, with high and low stove temps, and we can identify what the difference is.
I’ve never had bitter coffee from my stove-top, regardless of whether I’ve had it on full chat or just bubbling away slowly. Maybe I’m just lucky?
Surf-mat – the metal stove-tops won’t work with induction hobs as they are normally alloys of alu, rather than ferritic materials. If a magnet sticks to your pot, it’ll work. That said, the glowy type of hobs are usually halogen hobs – these will work with any.