Hey sj I have a full beard and I recently stopped trimming my mustache. So I understand what your dealing with. It all depends on what your going for with your beard I'm going for the year long beard so for me the rest of my beard was getting so big a trimmed mustache just wasn't looking good anymore it wasn't proportioned to the rest of the beard. So sit back and see what beard length style your going for and see if you should trim the mustache or just let it go. Also don't worry about what other people especially on the internet are going to think. We grow beards for us its a natural thing to do and no two beards are the same that's what makes your beard yours.