How to distinguish a bad dip manicure from a good dip manicure?

Sorry if this is a dumb question. I started getting dip manicures last year and I’ve gone to 8 different salons for dip manicures since. I’ve noticed each salon has their own technique and the nails turn out differently. My most recent dip manicure, the tech who is very sweet did not use UV except at the very end when top coat was applied. She let them air dry. She dipped my nails 3 times into the color. The nails turned out very thick and unlike the other dip manicures I’ve gotten. They look kind of cheap. I’ve noticed some dips turn out beautiful and expensive-looking and others don’t.