When I upload pictures from my cell phone, because I don't connect my cell phone to computer, I typically email myself the pics I want to save on my computer. (Yes, I download them and file them onto my computer,
From there, when I post them, I use the insert picture whiles editing my post. When making a post, there is a small menu available just above the area I'm typing at, 3rd icon from the right and I insert with that little Icon. It takes a second to upload, and before posting, if you double click on the image you just uploaded, a new little pop up menu comes up,, and with that menu, you can select the size of the image you'd like to show.
When members post a link, say to an add that has pictures, to bring that image over, I click on the add to open up the pictures I want to look at, and then I just cut and paste that image, onto the posts on here.
In my humble opinion, the absolute worse way of uploading an image to our site is posting a link to photo bucket (as an example). I find photo bucket to be slow, cumbersome, infested with junk pop ups, viruses, and lastly,, when the owner breaks the link, the pictures are no longer available. So, I don't know about everyone else, but for me, reading a post that has an image with it, really helps in understanding, without the image at times,, the original post is hardly worth the value of the post, specially when it makes mention of the image.
Hope this helps,,