You clearly haven't searched or done ANY reading if you are still asking whether strength is good for cats. Try again.
I apologise if this topic has been done to death, but my searches haven't been very fruitful - I can't find anything that seems to answer my questions clearly.
Given the lack of +str on leather gear at the mo, even with the high ratio of str->AP for a talented cat, I'm kind of at a loss as to how much emphasis I should be placing on chasing strength. My kit (mostly heroic or 10-man epics) has no +str at all, other than through enchants, and there isn't even much through those. I can gem for strength, but I'm wondering whether I should just keep going with AP/Agi/Crit instead.
At the moment, I've got about 900 agi and 45% crit unbuffed, and about 120 str. Given that I have so little, would adding even a little str through gemming and chants actually have a disproportionately large effect on my overall DPS?