I tried both imgur and photobucket. I personally like photobucket better, but that's just me.
As arrow30 said, pick one and learn how to use it. They WILL (money back guarantee) change something eventually and you have to relearn it, but the changes are usually very minor.
The nice thing is that we no longer have to resize the image before posting it on here. Once I learned how to post a whole string of images so they appear when you open the Trad Gang post instead of having to click on the link to see the pic, it's a piece of cake.