I had a sneaking suspicion Felicia might beat Gwen. She wont that poll earlier and is more current (being alive is almost cheating, really), plus, people are attracted to that type of character. It's the same reason why Mary Jane gained her following and people still want J Jonah Jameson ranting about Spider-Man long after any intelligent rational human being would have. They bring "excitement". As Chris Rock said, "There ain't nothing more excitin' than a bad relationship".
EDIT: In a almost completely unrelated controversy, Johnny is too high. Several other characters should have beaten him. As a supporting Spider-Man character, he doesn't bring much to the table, IMO.