Tough topic to get any meaningful answer, but I'll add my opinion. And I never sell any of mine. That's the best way to be able to determine which are the "favorite". Otherwise you're dealing with persistence of memory. Without your ears in real-time, all comparisons are invalid.
I still have the JBL mono 030 I scammed my dad out of when I was about 8-years old. Matched it to make a stereo pair almost 50-years ago. And I still own every speaker I've bought since. So, current favorites are determined from what I own right now, some of which I haven't even had the chance to try, yet:
JBL 4345
JBL L7
JBL L5
JBL L3
JBL L1
JBL 030
JBL L150A
JBL L112
JBL L96
JBL 4412A
JBL L80T/3
JBL L20T
They're all "favorite" in different situations, times, and place. Some are my favorite to loan to friends, some are favorites to give to children for their own homes, etc. I enjoy listening to all of them.
I also have JBL LX22, L26, 2500—and a pair of 250Ti's I've yet to audition.