My best routine is basic "old-school split". (I despise the term "bro split", modern day retardation).
Kvntz who say "PLL blows away bro-split"

No, its the same exact thing dummy.
Push - Chest, Tri (delts)
Pull - Back, Bi
Legs - Legs (delts)
Anyways, I like whole body once a week, did it my entire life (natty, age 12 to 50).
50 - Jumped on TRT, nothing has changed. (Natty+).
Chest/Tri
Back/Traps
Legs
Delts/Bi's
Misc Day (SQ, DL, etc)
Push it hard, use some sort of progression.
Mix the weight, volume, reps.
I love "Powerbuilding" style as some call it.
Main Powerlifts early in the session, higher rep hypertrophy/pump/assistance stuff at the end.
Im liking 5-days a week now over 6 lately.
Always loved the 4-day a week as well, focused routines on the big-4. (No, not strict curl, thats "wrist flip" lift).
-Bench
-DL
-SQ
-OHP
Big on the basics.
Might go to 4-days for the summer, as we tend to head out weekends in the summer to beach, etc.
MON - Bench and Pressing
TUE - DL / Back
Wed - OffTHU - SQ / Legs
FRI - OHP (delts) and Bi's
SAT - offSUN - offThrow in the missed stuff at the end of each session (forearms, abs, whatever)...
I say this alot (no, not the "dumb libturd line") but this one:
Find the routine you most enjoy, that one will be your most productive one...