I'm Asian with thick, full, straight Asian hair, and I've been permed for over a year. Most people think my hair is naturally wavy--even people who knew me pre-perm think I let it grow out into a wavy state. I get it re-permed every 6 months because my hair holds the waves really well. Even though 6 months means a lot of growth between perms, it doesn't look weird or unnatural. A lot of naturally wavy hair begins to curl a few inches from the scalp.
I think it really depends on where you go for the perm. If you go to a higher end salon that use quality products and train their staff well, then it will look very natural. If you go to a place where the staff isn't trained and don't use the latest products, it will probably look horrible.
I just use a hair treatment mask once a week and put some Kiehl's Creme with Silk Groom in my hair while it's still wet every time I shower. It doesn't look damaged at all. And I used to have completely bleached hair because I had it dyed pink for a while so the ends are probably damaged from that, but it looks normal.