Regarding habits, I also roast just one or maybe two SOs in my 2 kg HS once a fortnight. I do a 1kg load of each. I then make espressos of the SOs but dont do any blending. The reason why I dont blend is that given the variation in my roasting, grind, tamp and pour I would not be able to disentangle any characteristics of one bean from the others.
When I was roasting with my Gene Cafe last year I did a few blends but none were any better than a SO and it was just guesswork as to what might go with what. So ended up back at doing just SOs and have continued that mostly for the HG.
Other habits are that I usually stop at SC for just about anything. By the time I have heard SC and decided that what I heard was definitely SC its time to end so I dont end up off the RHS of the CS card.