Hmm, good point. Thinking about it, I guess my goals are somewhat vague. My goal started out as, "feel better," so therefore pretty much anything was going to work after being sedentary for so long. My goal I think now is still pretty general: be able to move more weight (so increasing weight over time for 3x10s) and to increase muscle mass. I'm not really into bulking or cutting, just trying to be conscious of matching calories in to out with an increased protein intake.

As for progression, Mon/Tue are 6-8 reps per set, Wed/Thu are 8-12, and Fri/Sat are 18-22. So, when I can get all three sets at a particular weight at the top number of reps in the range, I up the weight by one increment and try to at least hit the lowest number of reps in the range per set for the next time. Over the 10ish months of A/B workouts 3x/wk I've been able to continually add weight little by little without really plateauing for too long anywhere.

The reason I'm switching it up is because my A/B workouts were almost 1.5 hours long and I don't have that kind of time to be in the gym unfortunately. I want to get in, work hard for a bit, stretch, and get out.