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Most of the time I go for 'expression.'Though I think the right pauses or 'restraints' are needed for a good sort of timing/ reaction but I think 'expression' without or almost without censorship makes you far more interesting because with it, with all your transparency and idionsyncracies that you embrace and expose, makes you even more of an enigma. In other words, makes you more'interesting.' I believe that most of the time 'restrain' is just a means of too-cool-for-anything people to really hide the fact that they are not that interesting after all.