I am still very new to welding and have had mixed results. Reading this post, it looks like I am in the same boat. Overall though, I subscribe fishcop said, the difference between a good weld and a bad weld is the amount of grinding afterward.
I have been starting to use this technique that has worked pretty well for me, still learning though. Basically, you are using making a series of cursive e's. I like it better than the pause and drag as I couldn't do that as consistently.
Mig Welding Technique Taught by Old Timer - YouTube