Philosophy 101 (a)

As the Peanut classic strip illustrates, we sometimes pooh pooh people who seem to be doing nothing seriously in life. Isn't life supposed to be taken very seriously, and shouldn't we be thinking and doing serious things? Must we go through life intent on changing the world? Is it possible? Must we label Snoopy as a ne'er do well, dilettante going through his life always looking for enjoyable things to do? Maybe life is meant to be enjoyed and filled with pleasurable pastimes. I believe it is a matter of degrees, but that's only my opinion, after all this is Philosophy 101 (a) so what do you think?