I like the PT. I consider them more than watchable, and I get a lot of entertainment out of them. No, they’re not good, far from it, but I can still put one on and be transported to another galaxy for a couple of hours. I am grateful to all the extra Star Wars material they gave us as well.
Also, when I watched the PT when I was younger, it never occured to me that they had all these new concepts not seen in the OT. When I first watched Attack of the Clones, I was like of course Yoda had a lightsaber, of course all the Jedi have blue and green lightsabers, of course Dooku can have force lightening. I never realised that this was the first movie showcasing these things. I remember being surprised later on when I realised that Yoda never did, nor mentioned having a lightsaber in the OT, or that it was thought that force lightening was a power only the Emperor had.