I started with TeXworks (+ XeTeX, which both happen to have been created by Jonathan Kew) and I found no reason to change since then. The only slight drawback is that autocomplete support exists but is rudimentary, however it doesn’t bother me that much.
Which editor do you prefer?
MiKTeX, because it’s the first one I stumbled upon in high school and I don’t use LaTeX enough to be bothered to optimize my choice of editor.