On a digital camera you do not need an Ultra violet filter as the cameras sensor already blocks UV Light. A glass lens filter protector however will protect the filter thread of your lens.
The best lens protection is to keep it in the bank. Just kidding! Take care of your gear and use the lens cap and lens shade with each use...and do not forget to remove the lens cap to take pictures.
To each his own. I have a UV/Haze filter on every one of my lenses, I shoot with the lens hood on and the lens cap is on the lens at all times when not shooting.