I found the first two Manny vs JMM f!ghts entertaining. This last one was boring because early in the f!ght Manny realized that JMM was countering him too well. Manny was afraid to get in and throw his combos, so it turned into a one-punch from Manny to JMM trying to counter that one punch ever three or four exchanges.
Mayweather's f!ght are entertaining because you know what he's going to do. He will stand in the middle of the ring, turn his shoulder to you, and let you try to hit him. If you can hit him great, if not, then you'll get countered by his speed. Virtually all of Mayweather's f!ghts (in the last few years) have been good. You can say the same for Manny as well, expect for this last f!ght.
And this is from someone that doesn't like Mayweather (his attitude and just overall character... he's a great f!ghter though).