Uh, some of those are not Chopin's!
I can't help myself sometimes.
The thread title is strange, "most popular" has nothing to do with opinions.
Let's quantify by Yahoo search results-
"Chopin Etude op 10 no 1" = 2,210,000,000
"Chopin Etude op 10 no 12" = 3,820,000
"Chopin Etude op 10 no 3" = 911,000
"Chopin Fantasie Impromptu" = 441,000
"Chopin Ballade in G minor" = 236,000
"Chopin Funeral March" = 233,000
"Chopin Revolutionary Etude" = 184,000
As you can see, these numbers make no sense and are completely useless.