I tried to find similar question on meta, but without result.
I want to know which questions I answered are most popular to improve them and make them more helpful for new viewers.
Although it's not perfect, here is the query: http://data.stackexchange.com/stackoverflow/query/61163/which-of-my-answers-have-helped-the-internet
This lists your answers in descending order of "most helpful" as defined by:
Which can be significantly skewed by lot of answers. But you can fork the query to remove that factor.
A better query would be to weight it based on the score of your answer to the rest of the answers. There's lots of room to play around. Enjoy!