To offer another data point, my vote weights are also 3 / 10, and it hasn’t occurred to me to think about these things. I just treat my “3” as a “1″, and usually only strong-upvote if I get a clear feeling of “oh wow, I want to reward this extra hard” (i.e. my rule is something like “if I feel any uncertainty about whether this would deserve a strong upvote, then it doesn’t”).
To offer another data point, my vote weights are also 3 / 10, and it hasn’t occurred to me to think about these things. I just treat my “3” as a “1″, and usually only strong-upvote if I get a clear feeling of “oh wow, I want to reward this extra hard” (i.e. my rule is something like “if I feel any uncertainty about whether this would deserve a strong upvote, then it doesn’t”).