I don't know about other JS frameworks, but I've seen many people say they love angularJS, and I believe that's true, because that's exactly how I feel about angularjs ;)

I'm from a Windows dev background and all other exiting code editors/IDE I tried doesn't satisfy me so I'm building a new one.

And a handy tool is only a half for me to happily switch to web front end dev, and another half is a good framework, and I think angularjs can be that framework.

Have you checked out Sublime Text 2? Building an IDE is a tremendous amount of work, good luck!

Yes, ST 2 is great! And I've seen several ideas I got (inspired when using other IDE) are implemented in it. However, while it's not designed specified for html/css/js.

I use visual studio :)

Try webstorm , but dont expect the C#/Winforms level of integration. no GUI builder , no smart intellisence , etc ... it is because of the nature of javascript.

Yes, it's pretty great, although it's not fast enough in my experience, WebStorm will be my choice if I don't make my own. But the project (called LIVEditor) I'm working on is different - imagine a smart code editor is seamlessly integrated into Chrome browser (with the html inspector enabled) :)