If you meant to say you were addressing a group of cinema-goers who would watch films both collectively and individually, then I would firstly ask: What was the best film you all saw this year? Even that way: What was the best film we saw this year?
Then (on hearing the answer): What other films you may have seen individually you consider among the best?
Of course, the question was unnatural in the situation, but what I was trying to do was make it sound more or less realistic.
Azz was trying to use ‘all’ and ‘each’ in the situation s\he imagined. ‘All of you have come here to enjoy The Scorpions, though each of you can expect different emotions from their performance.’—something like that was asked in my view.
As to my question, I still don’t see the neccessity of ‘which’ (you may agree here) and ‘do’ in the sentence (you obviously disagree). ‘What definition you consider the most suitable: stubborn or obstinate?’ Still insist on the ‘do’?