I'm like RDarken - I really only like the human races (I consider Norn just really big humans).
I'm also used to GW1, where everyone was human, so that might have colored my thinking. I created a couple of asuras, but they didn't really click. I guess I had trouble identifying with them -- they seem too two-dimensional to me. I didn't plan on going with an engineer at all (not a big steampunk fan), but it occurred to me to create a human female in the mold of Saffron from Firefly. Really having a lot of fun with her.
Charr seems warrior, ele or necro to me from remembering them in GW1. My Norn is a ranger (just seems natural) and my other human is a reincarnation of my GW1 (human) mesmer. I feel there's a lot of potential in the sylvari, but I don't have a good handle on where they "fit." I originally thought of necro, since life and death are natural, and they seem to be in touch with nature, but I'm not sure yet...