One feature that I cannot live without is the way how TextMate handles tab completion (using ESC key).
You can press ESC key to get a match, but if you don’t like it, you can press ESC again, and again and again until you get what you want.
Very often you have similar method names in your files, pressing TAB twice would make it easy on you to find what you are looking for (without having to resort on CTRL+SPACE)
I stumbled upon this plugin the other day.
Install alternative_autocompletion from Package Control and check the README.md for setting up keybindings, or grab it from GitHub.
Speaking of this, is there a way to change the keyboard shortcut for autocompletion? I searched in the Default key bindings but was unable to find it. I’d really like to use just Esc and not Option-Esc. Now that Textmate 2.0 (alpha) has made an unlikely appearance, I find myself pining for all those shortcuts. I’ve made most of them, but this one I can’t find at all.
I also pine for Textmate’s bracket and parentheses highlighting, but I’m sure that’s something that can be added to Sublime (soon? 