Conversation so far:
How did Conan O'Brien start on Saturday Night Live?
In January 1988, Saturday Night Live's executive producer, Lorne Michaels, hired Conan O'Brien as a writer.
Did Conan O'Brien have any big skits on Saturday Night Live?
During his three years on Saturday Night Live (SNL), Conan O'Brien wrote such recurring sketches as Mr. Short-Term memory and The Girl Watchers.

Question: Who did he write the most for?
Self-contained rewrite: Who did Conan O'Brien write the most for?