As a windows user I used to work on WinEdt, then I fall in love with Kile editor on Linux. Finally I came across to Texmaker that became my favorite latex editor. It's multiplatform app, so I can effortlessly switch form one platform to another. And it has all features I love from both before-mentioned editors. 5 stars all the way!
Auto completion and hot keys are very useful. But the documentation needs more infomation.
Great, but be aware when using in spanish or catalan or other langueges: ti avoid the Babel error: Package babel Warning: No hyphenation patterns were loaded for...” you have to install texlive-lang-spanish