If you would like it to be easier to clean then yes, you should.
Previous post: Does my floor have to be level before I install tile?
Next post: Will sealing your tile and grout make it waterproof?
The Floor Elf
Help with all your tile needs (and extreme jackassery!)
Click here to get an instruction manual for your waterproofing installation
Click Above to have professional TileTips sent directly to your inbox.