TI-Basic: Hate it. Not because the language itself sucks but because of the editor it uses. Imagine vi, only without any features and perpetually in Replace mode. Javascript: Between the time I started programming at 14 and the time I started programming again at 19 (after a 5.5 year hiatus), I wrote only one useful script or program, and it was in Javascript. I love JS because it is both simple, easy to use, and powerful at the same time. And you don't have to write 50+ lines ...