I think it's more interesting to pick up an obscure character, or one from an obscure canon, than do a popular character from a popular canon. Those don't do well, or last long. No Harry or Ron has survived for any amount of time, nor have several attempts at hobbits, or Aragorn. Elrond is doing well, and in the first years I was there, Gil Whimple was a fixture everybody knew. Avengers!Loki barely manages to show his horns there for reasons of something; but there is a lady who does a contingent of steampunked Norse gods that I love to bits.

I however am probably queen of obscure characters from inaccessible canons that I just make work under their own steam. Both Teja and Urquhart fall in that category.