I like to tie fluorocarbon leaders to my braid so as to hide the line better
I guess if you're in clear water, then it doesn't matter as much.
I like using braid for the added casting distance more than anything, 20 lb braid has the diameter of 6 lb mono and casts small jigs incredibly well.....that's mainly why I do the leader thing. Plus, if I use a 6 llb fluoro leader, the leader breaks instead of the main line, which essentially lets the braid last forever since it never gets broke. I've used some braided line for over 4 years with this setup. I do the same thing for many of my bass spinning reels too.