Someone said that fun was doing something profitless and impractical; I find this
offensive.
What is to stop
work from being fun? The best way to
pursue happiness is to have fun while working; when your work and your
play merge, you're just about there. Work hard, then play hard, then
rest. But have fun throughout.
Fun is what you have when you do what you enjoy.
Happiness is when you enjoyed your whole life.
Caspen wrote below that "lessons are not learnt through fun",
however, I find that many lessons learned deepest are taught
in a fun way. Play, and thus fun, is an integral part
of early learning, and there's nothing (except irrational
pessimism) to prevent life long learning from being fun.
As to the rest -- I personally find problem solving fun
as well; having fun doesn't have to be unconstructive.
If you believe this, you're just letting your inner pessimist sour your life.
As to doing fun rather than having fun, I claim that's
purely a gramatical convention, and myself not having much
claim to being a linguist, I will not argue that either way. 8-) I have witnessed and experienced fun as a hallucinogen, however.
Are you having fun yet?