Being critical and the ablility to be ironic about our own favourite hobby is good IMHO. In the spirit of this, some gems from the internet.
Apologies if these are old news, I just happened on them.
The 10 Commandments of RPGs:
9gag.com/gag/aVOppxwThe Grand List Of Console Role Playing Game Clichés:
project-apollo.net/text/rpg.html(The later is a looooong list, but many items on it are actually valid for all (C)RPGs. Besides the fun it could point out a few thing which we can use/avoid in our (C)RPGs...)