Setting Unicode Hex Input as default

Hey. I know most of the unicode character codes I use a lot by heart, such as U+2325 (⌥) and U+2318 (⌘). However, It's a pain to click on the input menu, and switch the input method to Unicode Hex Input overtime I open an application. Or worse, forgetting to, then ending up typing some bull like '™£¡•' instead of what I intended. How can I make my SYSTEM-WIDE 'default' or basic input method STAY at Unicode Hex Input? Or for that matter, anything other than U.S. Extended.