I think typescript is such a good idea. And generics is a great addition.

The only thing I dislike about TS is the way it handles dependencies. The require/declare/import/export methodology confuses me. And on top of that there is the //<reference /> tag, and all of it seems to be relying on files, rather than on constructs in the code. Relying on files, means that I have to maintain the order of which to import what, and this becomes even harder if some of the files contain code that is not just module/class definitions, but actual statements in global scope.