I like how there are no ads on your comic on Comic Fury. Also, the url is more appealing than Smackjeeves. I just made an account on Smackjeeves regardless cuz I think that's a more popular site. 3nodding
For awhile I was posting my comics on my own site (wordpress/comicpress). That was great because it gave me total control and I really can't stand the look of free comics hosting sites, but...
It gets a little isolated. You have no real community built in so you have to go out and work for it. It helps to know about SEO and other traffic-building practices to bring in more general readership, too. And if anything goes wrong like your site gets attacked by malicious code or something, you are on your own!
Anyway, now I post my stuff on a blog, just a general wordpress.com blog, and I love it.