How do you feel about the level of character diversity you've experienced?

...well frankly I don't really care.  I've seen a lot of different characters that were unique and well written, but I've also seen plenty that were made diverse for diversity's sake and the character suffered for it.  I appreciate people who take the time to craft a well put together character that fits within whatever setting they have been put in.  Personally, I at least try to make sure whatever character I create doesn't have too much similarity with any other player character but aside from that I don't put too much thought into it.

For me personally, it is setting first and character second.  Even if it is a character I want to try out, if I feel I cannot properly put that kind of character into that story, I'll scrap the character and come up with something different.  Thankfully I have very rarely had to do that as I usually catch on before a character can be fully developed.

Make the character you want to create, make it fleshed out, and diversity will or won't happen; not a big deal either way as long as the characters are crafted well.