Out of the rods I normally fish, there is only two that I feel that the weight is a consideration.
My 10wt weighs about 5 1/2 oz. After a long session I have a sore wrist. This is probably more bad casting form than the rod weight. I have learned to wear an elastic wrist brace when I fish this rod.
The other rod is a rarely used glass 8wt that weighs in at around 7 1/2 oz. This rod casts like a rocket launcher. The only reason it doesn't get used more often is because it is way to heavy to cast all day.
For all my other rods, the weight doesn't seem to matter.
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"The man who knows all about trout does not exist,
although you have probably met him"
Samuel G. Camp 1911
The simpler the outfit, the more skill it takes to manage it, and the more pleasure one gets in his achievements.
--- Horace Kephart