From what I’ve gathered; people’s enjoyment/tolerance of the PT tends to hinge on either filmmaking execution or lore-importance.
Some people prefer TPM simply because it’s (arguably) the most well made of the three.
Though I personally think ROTS is the better story, I find TPM much more interesting overall. I’ve also noticed that many film-buffs, as well as film students (like myself), tend to be very fascinated by TPM.