I checked my stats, and I like that I have around 8.4 APR on my curation, which is pretty average. I don't even know how those people with 16 get theirs. I usually curate manually, but I also follow some curation trails just so I don't waste my votes in case I am away for a while. I mostly curate people that I follow, since I only follow them if I like their content. As for voting power, my auto curate triggers when my power reaches above 90, and I usually vote until I am around 70-80 power.