I think FanExpo is more geared toward the other types of geeks, rather than anime/manga fans, however, the anime section in the dealer's room is quite large, as well. I find that at FanExpo I tend to cosplay better known characters, because most people there are not anime fans.
I agree it's overpriced though, and I've never been to any panels there or anything, so I am hoping to do so this year.
That being said, I did have fun the past two years that I've gone. Last year I went on a Friday and it was nice to actually be able to walk around and look at stuff as Saturday is crazy busy.
I'm cosplaying this year too