Beethoven string quartets

I got a head start in Beethoven's late sting quartets (opp 127 thru 135)
when my mother gave me an LP with the Bflat major quartet op 130 / 133
for my birthday. I think I turned eighteen or nineteen back then. It was
the LaSalle Quartet. Later she gave me two more, with the A minor
quartet (132) and the C sharp minor (131).
I have been around the block many times since then. I have had times I
liked the Eflat quartet best, op 127. Or the valedictory op 135.
Because the 130/133 was my start, I have always remained attached to the
Bflat major. However, often I feel, as so many do, the op 131 is
Beethoven's ultimate string quartet.
So how do you feel? What is your favorite?