Rock Lee is the greatest.

Episodes 48-50 (Rock Lee v. Gaara) still get heavy rotation on my Media Player. Greatest fight to date, still.

There are a number of episodes I watch for brief moments, like Ep. 124, with Rock Lee unleashing his drunken fury on Kimimaro after falling on his face, and Neji's 128 Palms and determined finish on Kidoumaru, but I watch the above mentioned fight in its entirety all the time.

I do not think I could see myself watching the entire series from start to finish [current] again, though. Fillers are painful ..