The ONLY filter you need for digital photography

Digital cameras and editing have nearly eliminated the use of photography lens filters for me. I don't have a 'protection' filter on my lens as I feel it compromises the quality of my photos by adding a cheap flat piece of glass over my really good expensive curved glass. If I had small children who were prone to grabbing my camera or touching my lenses, I might consider putting on some protection. Even then, I'd remove it for the serious photos; the paying jobs.