You don't have to...
...be Responsible in order to be successful.
...solve all your problems in order to be happy.
...clean your house that often.
...be nice to your boss (even if you want to keep the job).
...work much.
...be honest without a good reason.
...sleep 8 hours a day to feel rested.
...drink 8 glasses of water a day to be hydrated.
...be married to be fulfilled.
...have kids to be fulfilled.
...use your turn signal when nobody's behind you, or when you're in a left-turn-only or right-turn-only lane.
Yikes, once I get going it's hard to stop.
But I'll stop.
ps: obviously these things have exceptions and devils in details and what not. I claim no responsibility for lost jobs, dehydration or anything else in that goes on in the lives of people I don't know for that matter.
pps: good post Tynan :)