I play rhythm games a lot and accidentally developed a taste for hardcore/speedcore music, which is probably uncommon. So this is something I’m quite curious
I think my cutoff for considering something fast is like between 200-220 BPM. For example, xi - FREEDOM DiVE has a BPM of 222.22, which… apparently I only consider as “fast”. Too fast is like 300 BPM for me
180 is the beginning of “fast” to me. But I can say I like a lot of fast music (I’m into J-core and punk)
In terms of how fast is “too fast” for me, my guess would be around 250, but I might’ve heard and liked something that fast without knowing it.