I like imageshack because you don't need an account to upload.
I like photobucket for things like "link to me" buttons, because they're kept in a neat gallery and I don't have to worry about people hotlinking my damn bandwidth because the images aren't hosted on my site :D
Someone hotlinked images I was using for a forum.
I made a new directory for the forum images I was using.
And made an extreamly large and annoying image for the ones being hotlinked, I had the right names for them to, so it just replaced the buttons they nicked of me.
Made there forum look a mess.
Servers them right.
Stupid hotlinkers >_>