Everytime you click somewhere, your history save the file and the line. then you can go backward and forward, just like in a Web browser.

It's very handy since you do a lot of back and forth while editing code, and you don't have to 'remember' to set a bookmark.

it's hard to do since you have to decide what to do in cases such as file and lines deletion.

I'd like to see an option which would put SublimeText 2 into a hidden but ready to launch mode when closing it (on Windows).  It takes several seconds to start, so it would be nice if 'closing' the app could hide it (perhaps to the tray) to speed startup.

I would like to see a document history tree feature like the one used in E-TextEditor. It allows for an undo history with a visual tree you can navigate through including branches. Add this with a diff feature to compare them and that would rock.

If you look at the link I include below you will see that it has a visual panel that comes up and lets you click on the different changes and branches and see what you had where. This allows the user to easily pluck deleted code from the history and add it back in without all that undoing and saving a bunch of other snippets into open blank document windows that you might have to do now.

Also, being able to use a diff tool on this would be even better so that you can see the differences between two different points in history or between the current version and a different point in history.

Ref: http://e-texteditor.com/blog/2006/making-undo-usable

I think the sidebar's active/open files list feature would be alot more useful (especially in projects with a big file tree) if there was an option to dock it to the top of sidebar, so it always remains visible instead of scrolling with the rest of the file tree. Optimally it would just resize vertically as files are added/removed from it (maybe have a max height setting too where after a certain point it will scroll itself.)

This would make it a more complete replacement for the tab bar, which I would prefer to hide, as vertical screen space is at a premium compared to horizontal space with widescreen monitors. And I'm the type of person that likes to see as many lines of code on screen as possible.

For a good example of this type of functionality, take a look at Espresso 2's UI (http://macrabbit.com/espresso/). Or even Chocolat (http://chocolatapp.com/).

How about having openable urls in documents? Many text editors have this feature; Evernote automatically turns typed links into clickable hyperlinks that open in the browser, and Textmate links are underlined and activated by a shortcut (numpad Enter). 

I had to click on preferences->color scheme->theme and the menu closes as soon as we select a theme.
A preview, while moving my mouse , or up-down keys on the menu items would be very helpful for those who would like to play  around with themes like me..

Edit files on server through a reverse SSH connection like rmate in Textmate 2

There is window.open_file() that can be used for opening .sublime-project files. However, it opens the file to a new tab for editing. The suggested window.open_project() would work differently. Instead of opening the file to the tab, it would act similarly if Project - Open Project... had selected from the toolbar.

Usage:

class FooCommand(sublime_plugin.WindowCommand):

    def run(self, *args, **kwargs):

        self.window.open_project("path/to/foo.sublime-project")

I suppose the closest to this is like a standard file explorer in the left sidebar. to have it open the main drive or some directory, where you can navigate the file system. This is the normal activity in coda, and would be like the sidebar in windows explorer file manager. 

Would be nice if Sublime had a theme editor similar to TextMate's "Fonts & Colors" in Preferences.

TextMate's was a bit messy because these colors were global. You had to add names (classes?) globally in Preferences. It would be nice if you could specify which names were colored in the language and what the default color is. Then when you view this "wizard" it shows you the options based on the current language (TextMate mixes functions with Markup). From there you could customize a color scheme for a language, or globally (for those that share names).