Rabbi Zeira רבי זירא

Bava Metzia 85a: "Rabbi Zeira, when he went up to the land of Israel, fasted a hundred fasts in order to forget the Babylonian Talmud, so that it would not trouble him."

The point of that line is not contempt for Babylonian learning but the difference of method: they argued differently in Babylonia than in the land of Israel, and a man used to one cast of analysis hears the other less well. He wanted to learn afresh.

Ketubot 112a shows the same longing literally: he crossed the Jordan by a rope bridge rather than wait for the ferry — and when asked where he was hurrying, answered that he was going where Moses and Aaron did not merit to enter.

In the Talmud he is also known for his gentleness: stories survive of how he would not answer rudeness, and how it was precisely this that made his ruffian neighbours repent. He also fasted carefully before issuing rulings.