^^^ Yeah it really depends on you. I always second guess my routines. If your using common sense, you should just find the best way by trial and error. Your recovery might be slower than normal by doing it as it is now, but whatever works for your current goal i guess.
it shouldnt depend on you at all. we are all homo sapien, therefore have the same anatomy. therefore have the same physiology. therefore the same workouts stimulate us the same as long as the same effort is put forth, the same diet is eaten, the same sleep patterns are used, and the stress level is the same. and that is where you get some differences, all the other variables. include the fact that people have slightly different efficiency levels in muscle firing patterns and are coming into a workout with different past training and you get a variance in training results but you do not get a difference in what works.
as for common sense, that is so rare it seems that it shouldnt have even been brought up. many people can lift for decades and still create idiotic workout plans and claim their workout is perfect. and why reinvent the wheel. i swear, exercise is one field of knowledge where trying to recreate the wheel is not only expected but looked highly upon. its like if someone tries to read a book and learn something their bro friends knock them for it. but we all know how knowledge can take us far, just look at zir red.
so no, dont use common sense and do trial and error. save yourself time in the world of instant gratification and do a proven program. if you want to learn more learn why the proven program works. and read up on other programs and try and find the similarities and differences of those program while you stick to that first proven program for 6-12 months. and yes, it takes that long to prove to yourself its going to work.
and last but not least if you really want to learn, pick up an anatomy and physiology book. by reading that you will be better educated then 90+% of the idiotic trainers that claim to be so good in this country.
*steps of soap box, leaves the room*