
Nero makes a really good point about playing the character before you play the trait.
I used to set the power level I thought was appropriate for C'kayah, which led to some RP where he was clearly over- or under-powered compared to the rest of the people I was playing with. These days I mainly just make it about the story: I play C'kayah (or my other alts) at whatever power level I think would make the story best. At whatever power level I think would lead to the most enjoyment. That hasn't really steered me wrong.
I used to set the power level I thought was appropriate for C'kayah, which led to some RP where he was clearly over- or under-powered compared to the rest of the people I was playing with. These days I mainly just make it about the story: I play C'kayah (or my other alts) at whatever power level I think would make the story best. At whatever power level I think would lead to the most enjoyment. That hasn't really steered me wrong.