Is it true that different people taste different things differently?

I have heard that some people taste things in a different way than others. I was wondering if this is true, and why/how. One popular example (that may or may not be related—I Don’t know) is the PTC paper. Some people taste bitterness, others don’t. I for one don’t taste anything, and am curious to exactly what/how bad the taste is Anyways, does anyone know? any scientists? thanks!