Some people march to the beat of a different drummer.

Related:

• Some people march to a different drummer-
  and some people polka...
• some people get pissed when you play with your mind
  in a different way than they play with theirs these...
• Some people never learn,
  some even later...
• Some people are so nice to be
  nasty to...
• Some people are wise;
  others are otherwise...
• Some people confuse boredom with
  security...
• You can fool some of the people some of the time, and some of the people all of the time,
  and that is sufficient...
• The way some people find fault,
  you'd think there was some kind of reward...
• Some people are born mediocre, some people achieve mediocrity,
  and some people have mediocrity thrust upon them....