Between the Canon 50 F1.2L and 35 F1.4L lenses,which do you feel would be a better walk-around lens for a Canon 1DX camera?And why?
It depends a lot on what you shoot when and where you walk around. Some wouldn't settle for less than a 70-200 zoom and others will need to be as unobtrusive as possible with a Shorty McForty on a Rebel. Or an S100. Your 1DX is not going to be unobtrusive! What other glass do you own?
Of the two lenses you've put there, the 35 f/1.4 will probably pick up the most votes if this was a poll. But they're both great lenses.
What can we say? Only you can answer this question because only you know the way you like to shoot.