I was hoping someone would answer before me.
I can't answer that. Character-wise, I had a lot of fun writing Finn but he didn't have a lot of plot to work with so he had his limits. The characters that have stayed with me the most are from Blood & Magic, since I probably wrote them the most throughout the various incarnations and there was always something interesting happening to steer my writing. Completely off the wall, I really really loved Madoc Beadles, the batty HP professor PB Misha Collins because I played him elsewhere too and he was a kick. Generally though the characters I feel like I connect with the most are in games that are short-lived, so I never get the chance to explore them.
Go ahead TPBM, same question again.