Photobucket is probably the worst image hosting site. What use is an image host with a bandwidth limit? I use imgur for all my image hosting needs.
http://imgur.com/
There are other's out there that work the same way, that's just the one I happen to use.
Edit:
http://tinypic.com/
http://imageshack.us/
Imageshack can be unreliable sometimes, but not as unreliable as photobucket.