I am going to start. I use two Latex/Tex editors: WinTex and PCTEXv6. I would say that both of them are useful and quite similar although the last one has more features than the first one.
Guys.. I actually use Eclipse.. They have a great plugin! The big advantage is that it compiles as you write and works the same way in most OS. Take a look at http://texlipse.sourceforge.net/