I got bored with Shippuden after the first episode--more speciaifcally, after the first 5 minutes. The last good ones were 133 and 134, the last 2 eps in Naruto vs. Sasuke III. But having episodes like that, which were hypnotically immersive despite being based on material I'd read to death, were few and far between.
That's why I only watched sporadically after the Chunnin Exam ended. And that's why I don't watch Shippuden--it's about as entralling as the better filler episodes.