FWIW, I have a 30.25 DL with a stick bow, 6'4" 240#
There are many factors that make a stick bow nice to shoot...its not just length.
But overall, for big guys like us with a long DL....I shoot my 64" a little better than my 62". No doubt a 66" would be even better.
Mine are ILF setups; long ILF limbs on a 17", 19" riser. I can mix and match all of my limbs on those risers.I like the grip on my 17 a little better....but my 19 just seems to shoot a little sweeter.....by that I mean, I seem to get a little bit less flyers and overall better groups. it has to be the extra length. They feel pretty close to the same.
Hunting wise its only a factor in GB's....my buddy has those cheap [small] GB's and I can't shoot any of my recurves out of them. ...or at least I'm limited so much as to where I can shoot out the windows its terrible.
I broke down and bought one of those big/tall GB's