I always line my holsters regardless. The rough side of leather is hard on the finish of the pistol.
I just started using dots, I've never liked too much bling but am starting to see the benefits.
I've been using domed rivets but be prepared to buy twice as many as you think your going to need and keep in mind, they always seem to be in low quantities when I need some.
Another thing to remember is to keep them positioned far enough away from the foot of your sewing machine so you don't crush them. Ask me how I know that. I've had to hand stitch in some areas because they were too close.