Don't get it? ![Huh ???](http://www.getbig.com/boards/Smileys/classic/huh.gif)
What's not wanting to do leg training got to do with true muscle failure in other body parts? ![Roll Eyes ::)](http://www.getbig.com/boards/Smileys/classic/rolleyes.gif)
I am confused by your post. ![Undecided :-\](http://www.getbig.com/boards/Smileys/classic/undecided.gif)
It indirectly tells me that you're not truly devoted to lift. In case you
are, you dive deep in EVERY muscle group. Your legs are roughly 50% of your body, so train them before someone calls
you a gym rat.
As for muscular failure, there's no need to go to failure each time. I believe it's counterproductive on the long run. Smart lifting means applying some kind of periodisation.