Hi jatindell, From your experience over the course of the 16 years, what is your go-to routine?
Either way, in regard to the point about training body parts more than once per week, it could definitely be a great option. The train-one-muscle-group-once-per-week concept is effective for newbies (with higher propensity to respond to the training stimulus) and steroid users. It's in many of the training programs you'd see in the fitness mags/resources, and is frankly misleading. Full-body and/or compound movements done multiple times per week is really the way to go. Even though you're on T, it's not at the supraphysiological levels of steroid users, so blasting one muscle group once per week wouldn't necessarily help you. For natural lifters, fewer sets per day (but spread out across 2 or 3 times per week) could be beneficial.
Though my routine evolves every couple months, I like training and see results when doing only one or two exercises per muscle group per day.