Suggested Zone(s) for leveling?

[Cerec]

Does anyone have what they feel is the more enjoyable (least tedious) zone(s) to level in from 20-60?

I'm primarily interested in suggestions for 20-60, but if you have any strong suggestions for the first few expansions (60-90), I'd love to hear those as well.

I don't think it would affect the answer, but the character I'm leveling is a void elf warrior or void elf priest (which do you think would be more fun? ..lol)

Thanks!