Textadept is an awesome text editor. I am a longtime Emacs user, and one of the things I never liked about Emacs was that you had to know Lisp in order to customize it.
Textadept is extended through Lua, which is a much less arcane language. After reading through the excellent documentation and looking at the actual source code, I was able to customize Textadept to exactly how I wanted it.
Textadept is also fast. It starts up much more quickly than Emacs.
The only complaint I have about Textadept is that the default Windows/Linux shortcut keys for splitting windows and moving between splits are too long. Pressing Ctrl+Alt+V all the time is kind of annoying. These were some of the first keybindings that I changed.