I love meat with a smoke ring, when I eat bbq it is one of the first things I look for. It tells me some love & time was put into smokin that meat. I have tasted plenty of bad bbq without a smoke ring, I dont think its a coincidence.
As a bbq guy I worry about & stay humble with every smoke I do no matter how many times I have done a particular meat. I am nervous until I cut or pull apart that first rib, or pull the first bit of pork off a butt or shoulder, hoping I see that ring. When i do i realx.
I know there is a way to cheat and get a smoke ring every time(rub your meat with tenderquick), but I prefer to get it the natural way(time, wood smoke, & low temps). By doing those 3 things I do pretty well, and turn out some good lookin' rings.
the above is my humble opinion, and what works for me, as always whatever works for each individual is all good.