Don't know if this has been discussed before...

I find myself gravitating towards meatier necks as years go by... Right now I really cannot play a guitar with a slim neck (e.g. Ibanez, Jackson, etc). Although I have small hands, I cannot find the correct "pivot points" with such necks and I find myself getting tired after a while. My left hand just seems to lock up... And it has nothing to do with speed, as far as I can tell for myself...

What's your experience? Where you stand on the "fat neck vs slim neck" argument?