Upper/lower splits or....

So i've been told so many different things and tried both and can't seem to figure out what works better. I'm an advanced lifter, been lifting for a few years now and was wondering what peoples opinions are on workouts. upper body days/lower body days or days where you work back/bi's, chest/tri's, legs/shoulders...looking for opinions.

lately i've been doing a 5 day. shoulders mon., tues back/traps, wed bi's, thur chest/tri's and legs on fri. abs and calves thrown in several days a wk. iv'e tried them all and i really like this one

Iam always mixing it up,right now iam doing a 5 day split.3 on,1 off,2 on,1 off.I do back & forearms.next day shoulder & tri's.next day bi's & calves then off.Then i do quads & hams.next day chest & shrugs then off.I like to really focus on each body part and kill it lol.Iam doing a 5x5 with it right now.Works great for me.I added an inch and a little over a quarter in two months to my arms on this routine.As long as my back behaves itself i'll continue this untill i just about burn myself out.