Well, I'm obviously not a dark-kin, but there is a lot of me in Kelb' and vice versa. I tend to be an outgoing person most of the time, and that's how I play Kelb'. As I don't really have a secondary of any prominence, I tend to grow attached to the main character I play.
I've always envisioned myself a 'bard' in real life and they are usually my favorite type of character to play. I also enjoy playing 'against type'. So a dark-kin legally allowed to carry a flintlock was a cool concept that I started with. I think bards are magical so I wanted some type of magical abilities, and of course flashy and unusual combat.
I see Kelb' as a 'face' of the organizations he's a part of, even if it might not be the best possible thing for the organization. He loves proving himself in the face of adversity and I really enjoyed the few Crusade modules where my race mattered (Tir Betoq was a great one!). He really is a 'good guy' but a little bit of a scoundrel as well who can justify almost any action.
I hope he comes across this way when I RP, though sometimes the makeup of a table can be difficult. I struggle sometimes between doing what I truly believe he would do and not wanting to cause a problem for the table. I try to make sure everyone has fun at a table, even if it means I have to take a step back.
Anyways, not sure if this is what you were going for Josh
John